I couldnt bear to stay out of this anymore, Dick is getting flamed, and it aint right.

1. Kris, you're wrong. 6 bolt pattern is for clamping, period. As mentioned previously you cant get enough clamping force with one large nut with large threads. 6 tight thread screws make it easy to accomplish a lot of force. Therefore, when the 6 bolts are tightened securely, it does not slip - due to the clamping. Ever notice what happens to a single bolt if it gets loose? It breaks, thats what. Why? because its not designed to handle side loaded stress, its designed to clamp - period.

2. CAP was talking to BOTH of you. You rain on parades yourself Kris. Once again, you assumed, and were wrong, I for one appreciate everything Dick has posted on this thread.

3. If I were a surgeon looking at that dual prop setup, I'd be thinking about the new boat I was going to buy when you showed up in the emergency room. Please dont attempt to run that thing in public, no sense in hurting anyone but yourself.