I'm doing one of my first kitbashes. Taking a Actionmaster Bumblebee head, and placing it on Energon Hot Shot to make Energon Bumblebee (and yes I have seen someone do this before -- sizewize it fits well). Only problem is that Hot Shot has one of those ball-joint/sockets to connect the head to the neck (similiar to those used on other Energon toys eg Rodimus/Prowl). And actionmaster bumblebee does not. What is the best way to carve out a socket? I don't want to mess it up, as I only have the one bumblebee head to work with. Carving knife? Drill? What do people use for this type of work?