Custom Shift Knob

thingiverse

I designed a unique shift knob for my VW Bug, giving it a funky twist. The inside shaft remained smooth in the final model because I found that using a tap to create the correct thread in the finished product was simpler than trying to get the printer to accurately print the threads. It's essential to print 100% infill or the shift knob will fail with use and heat. To achieve the desired smooth finish, I placed it on my drill press and used sandpaper to refine its surface. Edit: I've added a new version that uses an 8x1.25 tap.