Yes Storm, as others have stated, it is the hull that will bow out. But with the stretchers or outside supports, it really isn't a show stopper like you may thing. I suggest you research other boat refurbishing projects on here and see how they managed that issue. Actually not a hard things to do. It doesn't take a large number of supports as you will see. The only reason you need to support the hull is so when you start to reinstall the cap again, it will fit. If the hull bows out, and you do polyester work with stringers and new floor and such and it stays bowed out, the cap will not go back on... But it isn't a real problem if you just use some common sense when making the supports. We are not talking about micrometer precision, but common sense measurements. Post your progress, we will help...