Modifications are;

2 different (Lighter) base designs

Space for a stock encoder

3d printed scroll wheel included

Few holes in the front of the shell

Separation of the main mouse buttons to allow for printing without an error through JLCPCB/3DP

Removal of the back peg for the side button PCB. I have my PCB cut (see photos) to get rid of the ugly line going across the holes.