Just finished my 120 ulty. Ended up putting a YS 120 AC mounted inverted. Made a real neat looking installation. JR 811s on the wings. 8231 on the elevator, 4721 on the rudder,a Hitec HS 81 on the throttle with a Expert 1500 MA nmh battery. Mounted the fuel tank on the cg. The only thing that I didn't use was the nylon control horns I switched them out for Sullivan stamped steel and the gold clevises. I also added onre of the DP ultimate tail wheels. Mine balanced perfectly with a APC 16-8 prop and one of the Dave Brown Vortec Ultimate spinners. All up weight 12.2 pounds. Haven't flown it yet waiting for the weather to break. It should be a great flying plane with this set up don't know how it will tr but I am still trying to master that move with my UCD and Funtana. I will let yall know after it's maiden flight.