: Toying in my mind with some ideas on how to most easily and cheaply do my
: first SOF. I'm tempted by the Yost plywood/wood frames (no bent ribs). But
: this design would use a lot of plywood. So, can't one instead use open

Truth be told, it's really not that much plywood. In a 4' x 8' sheet of plywood, I was able to get the 4 forms for my daughter's Sea Flea, 7 forms for a Sea Tour 17 and the base ring + 2 risers for the coaming for the Sea Flea. I still have a fair amount of plywood left over (maybe 1/3 of the sheet).

-Doug