I got some 3/4 MDF from Home depot, more cardboard like than the standard fiberboard underlayment. It looks like people have used both in their builds. It seems pretty good as long as you pre-drill. Is this stuff OK?
Next ?- Has anybody cut foam for mold making purposes. what program (free is better) should i use to convert a solidworks model into a tool path. I will then lay glass over the foam to make a plug.
yeah MDF is what you want.
Predrill all the holes. Also, woodscrews will work when building, instead of tapping and using bolts.