Yeah, that foam board is a royal pain. I never use the stuff personally. Thanks goodness I have easy access to depron. Most of the shops here carry it, and the guy that cuts my kits for me has a large supply of full sheets.
The nose is supposed to have a natural downward curve to it. When I built my first one I thought I had cut it wrong, but all of them are like that.
PS - What are you doing up at 2am?!?!