Well I'm not going to be hitting anything HARD but it will be a winter training boat and will be an open water racer. It is not going to rip apart anytime soon as I used 4 inch 12 oz biax on the inside seams. I was experimenting with no filits on my side seams. That's why it leaks. I have them all filled with thikened epoxy, and I'm going to put gaffers tape over the seams. It will look good and work, and if it tears it will be easy to replace. I'll have some pics of the beast in a few days! she's gonna be fast, oh so fast, and she'll actually look pretty darn good. I really like the lines!