Playing around with a shifter knob design to integrate my video game trigger/clutch controller - created a plug out of pottery clay and got it painted/shiny to make a 2-part rubber mold. Put the mold back together and dumped some resin in it. Twenty minutes later I have a new plastic knob. Looks like it might take a few attempts to get the shape right for the trigger, but easy enough. Maybe I should knock out some clips for the e36 door cards.