There are only 3 keys on the bottom right, so menu was dropped
There are only 3 keys on the bottom left, so Pn was dropped because there is
no programmable layer.
There are only 12 keys in the first row, so the delete key (along with scroll
lock) has been dropped.
The F1-F12 keys have been shifted by 1 so they all fit in the first row of
layer 2.
Moved the grave/tilde to layer 1 (because in layer 2 it's now taken up by F1).
Keys relating to speed have been removed
The L_Win + L_Alt + R_spacebar = R_Shift, R_Alt, Menu and R_Ctrl as arrow keys as mentioned in the manual does not work.
The layer 2 plus shift should have support for symbols in the first row (where
the F1-F12 keys are) but this has not been implemented, so you need to use the
second row (where the numbers are).
