Re: Attaching limbs to a torso?
So from that I gather you plan to use a solid (hard) mold material to cast multiple pieces in production.
Why not use rubber and cast the figure in one piece in the rubber mold? A good silicon mold would last for a lot of castings and would eliminate the multiple piece problem. Polyurethane would work fine too but if you are going to use polyurethane resin for the finished piece you would have to be very careful with your mold release.
Unless of course I am missing something here.