The 11x4 worked on the stock one, but I turned it into swiss cheese trying to balance the spinner backplate. So I bought a dubro 2" spinner and it would not accept the 11x4. It would take a 10x7 easy, but not the other. I put 10 or 12 holes in the backplate and it would not even come close to balancing.

Body pilot, what did the eye hook sink into. I hope it did not weaken the main wing spar when you did.