Aw, crap.. my layout is not available in Massdrop's Configurator, maybe something went wrong when trying to save. Anyway... the highlights:
* Modifiers and Space on thumb keys: Left: Shift, Fn, Ctrl. Right: Space, Alt Gr, Ctrl. (inspired by µTron]
* Enter, Tab, Del and Backspace on the inner index-finger keys. (again, inspired by µTron)
* Arrow symbols on Fn-IJKL, with PgUp/PgDn/Home/End in positions around the arrows as on a numpad.
* Key to the left of 6 is "Num Lock". It changes the right side to a numeric keypad, and the left side to a half-keyboard where Fn makes it have the right keyboard's symbols. This is mostly an experiment.
In total, four layers: Default, Fn, Num Lock, Num Lock+Fn. Oh, it is also Swedish layout, which is why I have Alt Gr: Alt is not used.