Hello and thanks in advancd for any help. Im putting together a Bensen and it came with a 532 Rotax with gear drive and a ultra prop 6 blade. I called the manufacturer of the prop to make it was the correct one and he seemed to think everything was fine however when I look at where the engine would have to sit it seemed pretty high up. The guy I talked to said to leave 2'' of clearance from the blade tips to the tail boom which would put the bottom of the engine 37 inches up the mast. I assume there is a height that should not be exceeded. Its a 61 inch prop. This seems like it would all be very critical so I want to get it right the first time. Any advice would be greatly appreciated