On my 3W 100, I seem to have stripped the threads on one of the 6 prop bolts. 5 of the bolts tighten down nicely, but one of them will not tighten. The threads extend about ¾ ways through the prop hub, so if I get a slightly longer bolt (55mm) perhaps I can catch a couple threads deep into the hub. Any other ideas? Can I drill out the hole and tap it for a larger diameter bolt? Will this cause out of balance issue?