: Dave, thanks so much for those websites. Now that I have seen step by step
: how to build the SOF way, I am strongly considering it. Just one question,
: would an SOF kayak be sturdy enough to take on class 3 in a river? Also,
: what about rocks and such? The last thing I need is a hole in my boat.

Where are you hoping to paddle this thing? Slow rivers or white water. The yak that Aaron mentioned got swamped in a class II rapid and stuck against a rock underwater. There were river rats tuggind and pulling on it with no hope of it budging. They all were amazed at how strong it was as (according to them) most plastic boats would have bent under that circumstance. It was left for dead when it suddenly let loose and floated down stream on its own. So yes... they are definatly strong enough. Abrasion resistance is a different story. If you use it rough, it would need to be reskinned every year. Oysters are far more dangerous than rocks for puncturing holes.
Most ww slalom (spelling?) boats are fiberglass, so wood and fiberglass would work, but nothing beats plastic for hard use.
Scott