Hello! I'm starting on a companion cube from the game Portal made entirely out of pink insulation foam (to be coated in fiberglass resin eventually). This is my first time using this material and I've gotten some of my thinner pieces cut already, but I've hit a snag in that I don't know how to go about cutting the pieces of my cube base. I'm using 2" thick insulation foam, with pieces as large as 20"x20", but none of my hot tools have the stamina or design to cut down the center of a large piece (x-acto type hot knife, hot wire and a hot wand). What can I do?? Can I go back to Home Depot and ask them to cut my pieces down further with their saw, or is it all on me now?