I was given a kit built tandem plywood kayak. It has sat out in the weather and is very rotten. It appears to be made of 1/4" plywood (fir?) with a much thinner deck. The hull was glassed on the outside only. (maybe an after thought?)All the seams are held together with screws. They are "robertson" screws so am assuming it's a Canadian kit. There are #'s stamped on all the parts, and also model #655. Wondering if anyone recalls such a critter? (Not sure how to post a photo as I'm sure that would help!) Thanks, Roger