When I bought my 3D printer, I knew I wanted to print a Vault Boy bobblehead but I couldn't find a model that looked exactly the way I wanted with the classic Vault Boy thumbs up pose. After some searching I ended up finding a nearly perfect model without the thumbs up by drricketts and the charisma bobble head model by homerender. I used a combo of Meshmixer and Fusion 360 to play Dr Frankenstein, combinding the head, body and legs of drrickets' version and the arms of homerender's version.

The connection points on the head and neck are sized for one of the original Ender 3 v2 springs that I had sitting around after replacing them. It worked ok, but it's a little stiff, so you might want to find a different spring.