Just finished my 3D Mayhem with an OS Max 1.20 II w/Pump. I couldn't believe how nose heavy it came out. I had to put a set of 3300s mid through the back of the fuse to get it right. The rudder servo should really be in the back of the fuse. My question is to those of you flying a similar setup: What prop do you find it best for the 1.20? I installed an 18X6 wide APC. I wonder if that's going to be too hard on the engine.