Modified 3racing 14T pulley with 3D printed sleeve.
Drilled gearbox using a 3d printed jig, with a 3D printed sleeve to move the center gear shaft position.
Center gear shaft and 2 bearings re used coupled to a 3D printed belt flange. Also note the lazer ZX pulley combined with my new Mid half. Notice the scuff marks on the Mid Half diff pulley, this is caused by the incorrect inner radius on the machined pulley, pushing the belt of the pulley and causing it to slip.
How it looks like assembled.