The funny thing about nylon bolts is the fact that on smaller .40 models, 2 1/4-20 nylon bolts will not shear, my pulse xt bent the aluminum wing tube, ripped out the wood bolt plate and even sheared the 4-40 bolts holding the landing ger in place when I clipped the right wing on final approach into a soccer goal post. The trick to double wingbolts that are nylon is to lightly score the shank under the heads, this gives a weak point to fail, just what it was ment to do. I didn't do it on the pulse because I forgot to mod the bolts, some say it's an accident waiting to happen if you do it, but lets think about it for a second, the tension of tightening the bolt is far more than the flying loads on the wing, so if you partly invoke a weak point in the bolt( perferably at the bolt plate), then it will do it's job. I will remember to do that on every plane I own from now on, it would have costed me a wing only on the pulse, but now I have to fix a fuse as well now, but that prompted the extra build and you were guided to buy one by me and a few others, so I guess it was just ironic fate this happened to play out like this. As far as the boats go, I know enough to be dangerous, in aruba I tried to rent a boat but they were the price of a small village, just for a hour or two, so I passed up on it and got my scube cert instead, it only took me about 1 1/2 days, but before I could think of it, I was diving the antillia, a wwII german frieghter. But if you do decide to sail, and move to san fran, I'll give you the number of my brother, he lives at the base of diablo mountain, overlooking the bay. He's a closet sailer, when he lived in boston, we took a 28 catilina from boston to glouster and back in a daytrip, he belonged to boston sailing club. He really had almost no clue what he was doing and I let him do his own thing until after about 1 hour of him tacking back and forth I realized that we were going nowhere at all, I had to suggest that we alter the angle and drive longer before tacking.We finally got home and I swore to never let him pilot a vessel again. Well, keep at it, soon the fuse will be done and your going to find yourself saying, "really,...it's done?,... That was too soon?!"