Not too complicated. Shift knob on a C6 and C7 just uses one screw at the base. Took it off, and 3/4" OD aluminum tube slides on perfectly. Used a tubing bender to get the right bend and secured it with the screw. The 3 peg thing started out as all wood, but I needed something more robust, so I had it 3D printed and…

Yea, depends how much he lost. My right arm ends just below the elbow, so I designed this