modified skull with pointed teeth to have a recess in top of skull to fit a bluetooth media controller found on ebay for $11, and a recess in the bottom sized to fit a m10x1.5 tap so it can be threaded onto my integra shifter lever but other taps could work to fit your needs depending what diameter shift lever you have. printed on a voxel .18 layer 30%solid 4 shells matter hackers abs then acetone vapor bath for a couple hours.