The 4* 40 is an aerobatic trainer... floats on landing with no bad issues... I miss mine. I had duals a well with High Tech 81's.

If you want ot make it easy you can just mount them so the top of servo is hanging out the bottom of the wing.. but I always lay them on the side and just have the arm coming out a slot in the tray. more difficult to build somewhat but purdier too .