Time to give up

Ok I've had to abandon my first mould. I'll pour it differently next time..not in layers. The force of me pulling the softened wax out started pulling the first plaster layer off in parts and by Friday afternoon it was really messy. We tried to patch it up and air hose some of the bits out but it just made it worse. So my question is...To make it easier to steam out..do I make this section smaller?