Basically I wanted to do a custom Generations Overkill using FOC Grimlock and DOTM Laserbeak's guns. The idea is to add a pair of 5mm ports on top of the dino thighs/robot shoulders to mount the guns on them, but I don't want to drill holes on Grimlock. Sculpting them out of green stuff or similar stuff (along with the horn on the dino head) would work?