Well I just finished mine. I haven't weighed it in yet. For those that have flown, where did you balance yours. The instruction just seem like it is too far back. I have always balanced my planes on the main spar as a starting point in the past. I have a O.S. FS-91 four stroke in mine mounted inverted. I put a 12oz tank in it. The servos are all in the center section. The instructions show the elevator servo in a rear mount which I didn't use. I made my receiver pack with 5 AA nimh cells. Energizer just came out with 2000mah versions I built my pack with those. It is mounted in the cowl on the right side of the engine box (to help combat engine toque and the four stroke muffler comes out on the left side. I also built a microprocessor controlled on board glo that lights in the lower 1/4 of the throttle. Its AA 2000mah batter is on the other side of the engine box. I got a master airscrew 3-blade 13x8 prop only to find out from a O.S. tech that 13 was a bit big so I cut an inch off each blade and rebalanced effectively giving me a 11x8 which is in the range. Replaced the red 2-blade spinner with a 2 1/2" black 3-blade spinner. 3" Skylite wheel were used but I had to dremel the hubs so that the wheel collars would be recessed slightly into them and fit properly on the short shaft of the stock wires. Oh, had to buy those wheel collars. There was no way I was going to leave those collars with big screw sticking out of them that came with it on the plane. Half of the clevises I had to replace with my own stock and I may put all metal ones. While screwing 2 of the stock nylon clevises onto the rod they snapped right down the center section where the rod screws in. I have never seen one do that before. They were half way on before they snapped. I could see a in flight disaster there. I had to buy a extra roll of ultracote too. While trying to get the millions of wrinkles out with my heat gun, on the elevator control surface the cote pulled away from the surface because the edges weren't heated up well from the factory. So went along all edges with my iron, recovered the elevator (luckily it wasn't mounted to the plane yet and was easy) and got it assembled. By the way with the skin off you could see the buld job and the elevator lightening holes were hand cut out. Lines were not straight and looks like some sort of saw cut it out bceause you can see were the went over the edge slightly in spots. Can't see it with the skin on. I bet some 12 year old kid got paid big bucks for that job. Anyway, the plane is done and beautiful. I fired up the engine in the garage and aside from some tuning it I can tell this is going to be one fun plane. With all that work, bigger engine, batteries on the engine box, ect. the plane balances about 1/4" behind the main spar at about 2" away from the fuse sides. Does this sound close to those who have flown theirs? I'll have to snap some pics when I get a chance.