"Peter Cherry" wrote in message
om...
I've just had delivered 9 x 8x4 sheets of the Celotex delivered but
its 90mm thick, sounds like I'm doing to have fun with it ! Definitely
a saw and mask job I think.

Buy a new woodsaw. Biggest problem with thick sheets (I use 120mm a lot) is
keeping the cut parallel. Sometimes have to revert to a bit of scrapeing
away afterwards.