If any one is interested, my wood turtle deck finally came out at about 9 lbs, which is a little bit heavier than I was hoping for. Just for the record, if I were doing another one, I would use 1.5/2.0 mm Hoop pine for the ply frames and skin, ( hoop pine seems to be very springy stuff, but it is a certified engineering material ), omit one 5/8 thick wood rollover frame instead of having two, fit the skin as three separate peices, instead of two, for a total cost of about $70, and probably about 7 pounds. The equivalent foam version would cost about $100 for foam sheet, foam block would be about $400-$500 if not more if used, $40 dollars for resin and about $150 for glass and peel ply, so about $300 or so. If cost were not critical, then Gary Morgans core mat decks would be the way to go.
Chris Johnston North R ichmond NSW Australia.