I'am about to cut my forms for the Expedition single. What is the best material to use for the forms? I have used MDF for a previous boat and did not like it. some use OSB but all that is sold locally is 7/16". Cheap plywood(cdx) is 15/32" and already warped sitting in the the stack. I have heard someone say they had a terrible time with particleboard. The staples would not penetrate far enough to hold the strips. AC grade plywood is 15/32" and quite pricy. Any suggestions?

Question 2: best glue for attaching form sheets to form material. I have used the spray glue that is suggested in Nick's book previously. It is very toxic, expensive, and I had shrinkage problems (Wrinkles in paper the next day). Would Elmers white glue work?

Thanks,

Larry C.