I recently got my Showtime finished and I am running a Saito 150 in it. Mounted up with no problems using the stock blind nuts, I had to shave the mount a little to fit the crank case but no big deal and a small notch in the firewall for the muffler in which i put a block and shaped it out so it is still solid. I have Hitec 5625 digital and a 5645 digital for rudder with a 2700 mAh NiMH. I put the rudder servo in the tail and the receiver sits next to the throttle servo with the batter right behind the wing tube on the CG. Awsome engine for 3D, looks and sounds cool and all the power you could ever need, it will yank right out of a hover without hesitation! Walls are straight, wing rock is minimal until established in a harrier then it goes away, parachutes are smooth with no rock.