Coyote,

I just routered out a profile on the cheek that outlines the .72 throttle linkage and a flex wire no problem. You need to remove enough cheek area to get the width. The .72 is a superior set-up vs. a 2 stroke, has more torque, and can swing a larger prop which will result in way better low alttitude in your face 3D! I float this thing right past me at walking speed then punch it up into a hover. I think the Saito .72 makes any plane it's mounted to special. The Twist could be lighter, it's too heavy for really contemporary3D stuff, but fun enough. Get the engine in, and get it in the air, you'll like it!