As one of the flying 12s at Salcombe, we are not very good at DIY and all things crafty but our local 12 fleet had an away day in a barn making foils a few days before the open. I was a bit worried it might not hold as it was still being patched with plastic and sanded the day before but it held and it was very windy. We ahd the chance to contemplate it from all angles ( including upsdie down) So with the right tutor and support it was possible to construct one in a day and fettle it in one more day. May be Malcolm's idea of a ready made could also include 'tutored away days'?