I put a 12oz Hayes in there and I am running a saito 80 with a 12 x 8 prop. the battery is under the tank and the receiver is behind the tank in the notch of the wing. I have not had any problems with this combination and she will go vertical for almost forever. I did turn the carb around so the throttle is on the right and I took the choke off. I can get up to 20 minutes on a flight with this tank, engine, and prop combo.

I balanced it according to the manual but I did need some lead (1 oz) in the tail. this is because of the weight of the Saito 80 and the landing gear was moved up to the rear edge of the fuse in front of the leading edge of the wing.

I had to do this because mine went in and during the rebuilding process I made the wing bolt in instead of being glued in. I used four blocks. Two on the spars at the leading edge and two on the trailing edge like any other wing. I converted the bottom piece from the original landing gear block to the trailing edge of the wing to a hatch. I attached small wood blocks to the hatch sides to hold the bottom on.

I also added pull-pull for the rudder and I moved the throttle servo to the front side of the spar by cutting away the sheeting. I put the charge switch above the wing and below the cockpit.

Even though the wing is bolted on is does not come out like a regular wing. But at least I can take it apart if i need to get in there. It came out really good and she flies great!! I also put some CA on the insides of the fuse going to the tail while I had it apart as there were some loose spots.

It was a-lot of work but man was it worth it!!!!