diff --git a/src/keyboard/ergodox.c b/src/keyboard/ergodox.c
index afd5a56..12b5f32 100644
--- a/src/keyboard/ergodox.c
+++ b/src/keyboard/ergodox.c
@@ -7,7 +7,7 @@
  * ------------------------------------------------------------------------- */
 
 
-#include "lib/_data-types.h"
+#include "lib/data-types.h"
 
 #define KEYBOARD_INCLUDE_PRIVATE
 #include "ergodox/matrix.h"
diff --git a/src/keyboard/ergodox.h b/src/keyboard/ergodox.h
index 4082aaf..13d096b 100644
--- a/src/keyboard/ergodox.h
+++ b/src/keyboard/ergodox.h
@@ -11,7 +11,7 @@
 #ifndef ERGODOX_h
 	#define ERGODOX_h
 
-	#include "lib/_data-types.h"
+	#include "lib/data-types.h"
 
 	#include "ergodox/layout.h"      // number of layers, layout
 	#include "ergodox/matrix.h"      // kb dimensions, matrix status
diff --git a/src/keyboard/ergodox/layout.h b/src/keyboard/ergodox/layout.h
index a132ede..a875b0e 100644
--- a/src/keyboard/ergodox/layout.h
+++ b/src/keyboard/ergodox/layout.h
@@ -11,10 +11,8 @@
 #ifndef LAYOUT_h
 	#define LAYOUT_h
 
-	#include <avr/pgmspace.h>
-
-	#include "lib/_data-types.h"
-	#include "lib/_key-functions.h"  // for `kbfun_funptr_t`
+	#include "lib/data-types.h"
+	#include "lib/key-functions.h"  // for `kbfun_funptr_t`
 
 	#include "matrix.h"  // for number of rows and columns
 
diff --git a/src/keyboard/ergodox/layout.md b/src/keyboard/ergodox/layout.md
index 8191564..d48537c 100644
--- a/src/keyboard/ergodox/layout.md
+++ b/src/keyboard/ergodox/layout.md
@@ -21,19 +21,14 @@ To write a new one:
   (../../lib/_usb/keyboard-usage-page--short-names.h) for available keycodes.
 * See [key-functions.c] (../../lib/_key-functions.c) for what functions keys
   can call.
+* See [_defaults.h] (layout/_defaults.h) for default function layers and
+  aliases.
 
 
 ## notes
 
-* Assuming 560 bytes for everything else in RAM space, there's 2000 bytes left
-  for the layout.  This should be enough for about 7 layers.  Watch your RAM
-  usage if you're getting close.
-
-    * The layout matricies could be moved to flash memory (program space,
-      instead of data space) in order to save RAM, but that doesn't seem
-      necessary at the moment.  It would also be slightly slower, though that
-      probably shouldn't be a concern.
-
+* Each layer takes 420 bytes of memory, wherever it's stored.  (The matrix size
+  is 12x7, keycodes are 1 byte each, and function pointers are 2 bytes.)
 
 -------------------------------------------------------------------------------
 
diff --git a/src/keyboard/ergodox/layout/_defaults.h b/src/keyboard/ergodox/layout/_defaults.h
new file mode 100644
index 0000000..f7cc211
--- /dev/null
+++ b/src/keyboard/ergodox/layout/_defaults.h
@@ -0,0 +1,63 @@
+/* ----------------------------------------------------------------------------
+ * ergoDOX layout : default layers and aliases
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2012 Ben Blazak <benblazak.dev@gmail.com>
+ * Released under The MIT License (MIT) (see "license.md")
+ * Project located at <https://github.com/benblazak/ergodox-firmware>
+ * ------------------------------------------------------------------------- */
+
+
+// aliases
+#define NA     0     // for keys not available on the matrix
+#define NOP    0     // for keys that do nothing
+#define f_NA   NULL  // for functions not available on the matrix
+#define f_NOP  NULL  // for functions that do nothing
+// --- require "lib/key-functions.h"
+#define f_press   &kbfun_press
+#define f_release &kbfun_release
+
+
+#define DEFAULT_LAYER_PRESS \
+{ \
+/* right hand */ \
+/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/ \
+/* 0 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 0 */ \
+/* 1 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 1 */ \
+/* 2 */ {  f_NA      , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 2 */ \
+/* 3 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 3 */ \
+/* 4 */ {  f_NA      , f_NA      , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 4 */ \
+/* 5 */ {  f_NA      , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 5 */ \
+/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/ \
+/* left hand */ \
+/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/ \
+/* 6 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 6 */ \
+/* 7 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 7 */ \
+/* 8 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_NA       }, /* 8 */ \
+/* 9 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 9 */ \
+/* A */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_NA      , f_NA       }, /* A */ \
+/* B */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_NA       }  /* B */ \
+/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/ \
+}
+
+#define DEFAULT_LAYER_RELEASE \
+{ \
+/* right hand */ \
+/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/ \
+/* 0 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 0 */ \
+/* 1 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 1 */ \
+/* 2 */ {  f_NA      , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 2 */ \
+/* 3 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 3 */ \
+/* 4 */ {  f_NA      , f_NA      , f_release , f_release , f_release , f_release , f_release  }, /* 4 */ \
+/* 5 */ {  f_NA      , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 5 */ \
+/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/ \
+/* left hand */ \
+/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/ \
+/* 6 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 6 */ \
+/* 7 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 7 */ \
+/* 8 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_NA       }, /* 8 */ \
+/* 9 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 9 */ \
+/* A */ {  f_release , f_release , f_release , f_release , f_release , f_NA      , f_NA       }, /* A */ \
+/* B */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_NA       }  /* B */ \
+/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/ \
+}
+
diff --git a/src/keyboard/ergodox/layout/qwerty.c b/src/keyboard/ergodox/layout/qwerty.c
index 6a71be3..0da753f 100644
--- a/src/keyboard/ergodox/layout/qwerty.c
+++ b/src/keyboard/ergodox/layout/qwerty.c
@@ -9,24 +9,13 @@
  * ------------------------------------------------------------------------- */
 
 
-#include <avr/pgmspace.h>
-
-#include "lib/_data-types.h"
-#include "lib/_usb/keyboard-usage-page--short-names.h"
-#include "lib/_key-functions.h"
+#include "lib/data-types.h"
+#include "lib/usb/keyboard-usage-page--short-names.h"
+#include "lib/key-functions.h"
 
 #include "../matrix.h"
 #include "../layout.h"
-
-
-// aliases
-#define NA     0     // for keys not available on the matrix
-#define NOP    0     // for keys that do nothing
-#define f_NA   NULL  // for functions not available on the matrix
-#define f_NOP  NULL  // for functions that do nothing
-// --- 
-#define f_press   &kbfun_press
-#define f_release &kbfun_release
+#include "_defaults.h"  // for default layers and aliases
 
 
 // error check; everything below assumes these dimensions
@@ -36,8 +25,8 @@
 
 
 uint8_t _kb_layout[KB_LAYERS][KB_ROWS][KB_COLUMNS] = {
-{  // layer 0: default
-// right hand
+{  /* layer 0: default */
+/* right hand */
 /*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/
 /* 0 */ {  NOP       , _6        , _7        , _8        , _9        , _0        , _dash      }, /* 0 */
 /* 1 */ {  NOP       , _Y        , _U        , _I        , _O        , _P        , _bracketL  }, /* 1 */
@@ -46,7 +35,7 @@ uint8_t _kb_layout[KB_LAYERS][KB_ROWS][KB_COLUMNS] = {
 /* 4 */ {  NA        , NA        , _arrowU   , _arrowD   , _backslash, _bracketR , NOP        }, /* 4 */
 /* 5 */ {  NA        , _ctrlR    , _altR     , _pageU    , _pageD    , _enter    , _space     }, /* 5 */
 /*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/
-// left hand
+/* left hand */
 /*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/
 /* 6 */ {  _equal    , _1        , _2        , _3        , _4        , _5        , NOP        }, /* 6 */
 /* 7 */ {  _tab      , _Q        , _W        , _E        , _R        , _T        , NOP        }, /* 7 */
@@ -59,48 +48,10 @@ uint8_t _kb_layout[KB_LAYERS][KB_ROWS][KB_COLUMNS] = {
 };
 
 kbfun_funptr_t _kb_layout_press[KB_LAYERS][KB_ROWS][KB_COLUMNS] = {
-{  // layer 0: default
-// right hand
-/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/
-/* 0 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 0 */
-/* 1 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 1 */
-/* 2 */ {  f_NA      , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 2 */
-/* 3 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 3 */
-/* 4 */ {  f_NA      , f_NA      , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 4 */
-/* 5 */ {  f_NA      , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 5 */
-/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/
-// left hand
-/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/
-/* 6 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 6 */
-/* 7 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 7 */
-/* 8 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_NA       }, /* 8 */
-/* 9 */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_press    }, /* 9 */
-/* A */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_NA      , f_NA       }, /* A */
-/* B */ {  f_press   , f_press   , f_press   , f_press   , f_press   , f_press   , f_NA       }  /* B */
-/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/
-}
+/* layer 0: default */ DEFAULT_LAYER_PRESS
 };
 
 kbfun_funptr_t _kb_layout_release[KB_LAYERS][KB_ROWS][KB_COLUMNS] = {
-{  // layer 0: default
-// right hand
-/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/
-/* 0 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 0 */
-/* 1 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 1 */
-/* 2 */ {  f_NA      , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 2 */
-/* 3 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 3 */
-/* 4 */ {  f_NA      , f_NA      , f_release , f_release , f_release , f_release , f_release  }, /* 4 */
-/* 5 */ {  f_NA      , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 5 */
-/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/
-// left hand
-/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/
-/* 6 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 6 */
-/* 7 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 7 */
-/* 8 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_NA       }, /* 8 */
-/* 9 */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_release  }, /* 9 */
-/* A */ {  f_release , f_release , f_release , f_release , f_release , f_NA      , f_NA       }, /* A */
-/* B */ {  f_release , f_release , f_release , f_release , f_release , f_release , f_NA       }  /* B */
-/*        ---- 0 ---- ---- 1 ---- ---- 2 ---- ---- 3 ---- ---- 4 ---- ---- 5 ---- ---- 6 ----	*/
-}
+/* layer 0: default */ DEFAULT_LAYER_RELEASE
 };
 
diff --git a/src/keyboard/ergodox/matrix.c b/src/keyboard/ergodox/matrix.c
index 7b18951..3a1f9e7 100644
--- a/src/keyboard/ergodox/matrix.c
+++ b/src/keyboard/ergodox/matrix.c
@@ -7,7 +7,7 @@
  * ------------------------------------------------------------------------- */
 
 
-#include "lib/_data-types.h"
+#include "lib/data-types.h"
 
 #include "matrix.h"
 
diff --git a/src/keyboard/ergodox/matrix.h b/src/keyboard/ergodox/matrix.h
index e782487..1ee9907 100644
--- a/src/keyboard/ergodox/matrix.h
+++ b/src/keyboard/ergodox/matrix.h
@@ -10,7 +10,7 @@
 #ifndef MATRIX_h
 	#define MATRIX_h
 
-	#include "lib/_data-types.h"
+	#include "lib/data-types.h"
 
 	#define KB_ROWS    12  // must match real life
 	#define KB_COLUMNS  7  // must match real life
diff --git a/src/keyboard/ergodox/mcp23018.c b/src/keyboard/ergodox/mcp23018.c
index 2be6cdd..42670bc 100644
--- a/src/keyboard/ergodox/mcp23018.c
+++ b/src/keyboard/ergodox/mcp23018.c
@@ -8,9 +8,8 @@
 
 
 #include <util/twi.h>
-
-#include "lib/_data-types.h"
-#include "lib/_twi.h"  // `TWI_FREQ` defined in "teensy-2-0.c"
+#include "lib/data-types.h"
+#include "lib/twi.h"  // `TWI_FREQ` defined in "teensy-2-0.c"
 
 #define KEYBOARD_INCLUDE_PRIVATE
 #include "matrix.h"
diff --git a/src/keyboard/ergodox/mcp23018.h b/src/keyboard/ergodox/mcp23018.h
index 8f57af8..ef29523 100644
--- a/src/keyboard/ergodox/mcp23018.h
+++ b/src/keyboard/ergodox/mcp23018.h
@@ -10,7 +10,7 @@
 #ifndef MCP23018_h
 	#define MCP23018_h
 
-	#include "lib/_data-types.h"
+	#include "lib/data-types.h"
 
 	#ifdef KEYBOARD_INCLUDE_PRIVATE
 
diff --git a/src/keyboard/ergodox/teensy-2-0.c b/src/keyboard/ergodox/teensy-2-0.c
index 89eda5b..eea042b 100644
--- a/src/keyboard/ergodox/teensy-2-0.c
+++ b/src/keyboard/ergodox/teensy-2-0.c
@@ -8,10 +8,9 @@
 
 
 #include <avr/io.h>
-
-#include "lib/_data-types.h"
+#include "lib/data-types.h"
 #define TWI_FREQ 400000
-#include "lib/_twi.h"
+#include "lib/twi.h"
 
 #define KEYBOARD_INCLUDE_PRIVATE
 #include "matrix.h"
diff --git a/src/keyboard/ergodox/teensy-2-0.h b/src/keyboard/ergodox/teensy-2-0.h
index 68ec677..dfdf990 100644
--- a/src/keyboard/ergodox/teensy-2-0.h
+++ b/src/keyboard/ergodox/teensy-2-0.h
@@ -11,8 +11,7 @@
 	#define TEENSY_2_0_h
 
 	#include <avr/io.h>  // for the register macros
-
-	#include "lib/_data-types.h"
+	#include "lib/data-types.h"
 
 	#include "matrix.h"
 
diff --git a/src/lib/pjrc/readme.md b/src/lib-other/pjrc/readme.md
similarity index 100%
rename from src/lib/pjrc/readme.md
rename to src/lib-other/pjrc/readme.md
diff --git a/src/lib/pjrc/usb_keyboard/usb_keyboard.c b/src/lib-other/pjrc/usb_keyboard/usb_keyboard.c
similarity index 100%
rename from src/lib/pjrc/usb_keyboard/usb_keyboard.c
rename to src/lib-other/pjrc/usb_keyboard/usb_keyboard.c
diff --git a/src/lib/pjrc/usb_keyboard/usb_keyboard.h b/src/lib-other/pjrc/usb_keyboard/usb_keyboard.h
similarity index 100%
rename from src/lib/pjrc/usb_keyboard/usb_keyboard.h
rename to src/lib-other/pjrc/usb_keyboard/usb_keyboard.h
diff --git a/src/lib/_data-types.h b/src/lib/data-types.h
similarity index 100%
rename from src/lib/_data-types.h
rename to src/lib/data-types.h
diff --git a/src/lib/_key-functions.c b/src/lib/key-functions.c
similarity index 95%
rename from src/lib/_key-functions.c
rename to src/lib/key-functions.c
index 8b279eb..38ed6e8 100644
--- a/src/lib/_key-functions.c
+++ b/src/lib/key-functions.c
@@ -11,13 +11,12 @@
  * ------------------------------------------------------------------------- */
 
 
-#include "lib/pjrc/usb_keyboard/usb_keyboard.h"
-#include "lib/_data-types.h"
-#include "lib/_usb/keyboard-usage-page.h"
-
+#include "lib-other/pjrc/usb_keyboard/usb_keyboard.h"
+#include "lib/data-types.h"
+#include "lib/usb/keyboard-usage-page.h"
 #include "keyboard.h"
 
-#include "_key-functions.h"
+#include "key-functions.h"
 
 
 // ----------------------------------------------------------------------------
diff --git a/src/lib/_key-functions.h b/src/lib/key-functions.h
similarity index 96%
rename from src/lib/_key-functions.h
rename to src/lib/key-functions.h
index 99367ea..166c323 100644
--- a/src/lib/_key-functions.h
+++ b/src/lib/key-functions.h
@@ -10,7 +10,7 @@
 #ifndef KEY_FUNCTIONS_h
 	#define KEY_FUNCTIONS_h
 
-	#include "lib/_data-types.h"
+	#include "lib/data-types.h"
 
 	typedef void (*kbfun_funptr_t)(uint8_t*, uint8_t*, uint8_t*, uint8_t*);
 
diff --git a/src/lib/readme.md b/src/lib/readme.md
index 2bbef28..2f676c7 100644
--- a/src/lib/readme.md
+++ b/src/lib/readme.md
@@ -1,9 +1,6 @@
 # src/lib
 Stuff that's generally useful
 
-* Directories prepended by a `_` were written for (and exist solely in) this
-  project.
-
 -------------------------------------------------------------------------------
 
 Copyright &copy; 2012 Ben Blazak <benblazak.dev@gmail.com>  
diff --git a/src/lib/_twi.h b/src/lib/twi.h
similarity index 92%
rename from src/lib/_twi.h
rename to src/lib/twi.h
index e52db3a..6221bd5 100644
--- a/src/lib/_twi.h
+++ b/src/lib/twi.h
@@ -15,7 +15,7 @@
 #undef _inc
 #define _str(s) #s          // stringify
 #define _expstr(s) _str(s)  // expand -> stringify
-#define _inc _expstr(_twi/MAKEFILE_BOARD.h)  // inc(lude)
+#define _inc _expstr(twi/MAKEFILE_BOARD.h)  // inc(lude)
 #include _inc
 #undef _str
 #undef _expstr
diff --git a/src/lib/_twi/teensy-2-0.c b/src/lib/twi/teensy-2-0.c
similarity index 98%
rename from src/lib/_twi/teensy-2-0.c
rename to src/lib/twi/teensy-2-0.c
index 41b1949..7c3ed69 100644
--- a/src/lib/_twi/teensy-2-0.c
+++ b/src/lib/twi/teensy-2-0.c
@@ -21,10 +21,8 @@
  * ------------------------------------------------------------------------- */
 
 
-#include <util/delay.h> //dbg
 #include <util/twi.h>
-
-#include "../_twi.h"
+#include "lib/twi.h"
 
 
 void twi_init(void) {
diff --git a/src/lib/_twi/teensy-2-0.h b/src/lib/twi/teensy-2-0.h
similarity index 100%
rename from src/lib/_twi/teensy-2-0.h
rename to src/lib/twi/teensy-2-0.h
diff --git a/src/lib/_twi/teensy-2-0.md b/src/lib/twi/teensy-2-0.md
similarity index 100%
rename from src/lib/_twi/teensy-2-0.md
rename to src/lib/twi/teensy-2-0.md
diff --git a/src/lib/_usb/keyboard-usage-page--short-names.h b/src/lib/usb/keyboard-usage-page--short-names.h
similarity index 100%
rename from src/lib/_usb/keyboard-usage-page--short-names.h
rename to src/lib/usb/keyboard-usage-page--short-names.h
diff --git a/src/lib/_usb/keyboard-usage-page.h b/src/lib/usb/keyboard-usage-page.h
similarity index 100%
rename from src/lib/_usb/keyboard-usage-page.h
rename to src/lib/usb/keyboard-usage-page.h
diff --git a/src/lib/_usb/led-usage-page.h b/src/lib/usb/led-usage-page.h
similarity index 100%
rename from src/lib/_usb/led-usage-page.h
rename to src/lib/usb/led-usage-page.h
diff --git a/src/main.c b/src/main.c
index 4de7400..fe53bb8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -9,9 +9,8 @@
 
 
 #include <util/delay.h>
-
-#include "lib/pjrc/usb_keyboard/usb_keyboard.h"
-#include "lib/_data-types.h"
+#include "lib-other/pjrc/usb_keyboard/usb_keyboard.h"
+#include "lib/data-types.h"
 
 #include "keyboard.h"
 
diff --git a/src/makefile b/src/makefile
index f5bc96c..f120b12 100644
--- a/src/makefile
+++ b/src/makefile
@@ -41,6 +41,9 @@ SRC += $(wildcard keyboard/$(KEYBOARD)/layout/$(LAYOUT)*.c)
 SRC += $(wildcard lib/*.c)
 SRC += $(wildcard lib/*/*.c)
 SRC += $(wildcard lib/*/*/*.c)
+SRC += $(wildcard lib-other/*.c)
+SRC += $(wildcard lib-other/*/*.c)
+SRC += $(wildcard lib-other/*/*/*.c)
 
 OBJ = $(SRC:%.c=%.o)