---Have:
plus   -> ?  (claims keycode 218, sym 0x3f)
number -> ~  (claims keycode 221, sym 0x7e)
tilde  -> ½ (claims keycode 223, sym 0xbd)
pipe   -> § (claims keycode 231, sym 0xa7)
carat  -> ° (claims keycode 232, sym 0xb0)
---Want:
plus   -> equal    - keycode 207
3      -> number   - keycode 140
grave  -> tilde    - keycode 205
6      -> carat    - keycode 143


keycode on XFree86 for tilde:     49, sym 7e
the xgltex server thinks it's on: 60, sym 7e