But seriously…how about getting a couple of the inner beam castings (the half moon ones you bolt thru when attaching your beams to the hulls) put them inside the forward beam half way between the hull and the mast. Make up your motor mount with the shape of half the beam cut away, and use machine screws to thread right into the beam and the casting inside the beam. It would be strong, look very professional if done properly and would not be to intrusive when the motor is not used…this is assuming you are not using a spinnaker to get hung up it.

Just a thought…

Bob