The WP 110 is intended for 2S 2 inch. The 2.5mm thickness to get a little more torsional rigidity. This small change helps reduce noise getting to the gyro allowing less filtering and associated latency. 

Version 4.1 slightly increases the strength at the middle of the motor mount.

Frame: 110 mm MTM, 2.5 mm thick

FC: 16 x 16 stack, 25.5 x 25.5 AIO square orienation, 25.5 x 25.5 AIO whoop orientation (will work with with two screws)

Motor: 2 mm on 9 mm diameter

Props: 2 inch

Canopy: Zip-tie Canopy or the new Printed canopy.(see the canopy tab for the file https://ko-fi.com/quad66/shop)

Weight (aproximate): 4.4 gm