: Hi
: Ive just finished a SOF with 7mm (1/4 + in) ply strengthened where
: needed.
: Probably didnt save much in weight individually on the frames as I
: didnt remove the centre portions
: because may want to add a hatch
: But its an option see
: http://picasaweb.google.com/suenivennz/HybridBuild#
: Cheers
: Niven

I did the same thing on my catamaran kayak, it's got 1/4" ply frames, with lightening holes drilled in them. Standard 1/2" ply frames would have been a heck of alot less work and probably lighter. It does look cool, kinda like an airplane inside, cept it'll all be covered and no one will see it.

Bill H.