RE: Balanceing the Yellow Aircraft P-47
Here's what I did. I knew the plane was going to need nose weight, as most round-cowled warbirds do. I put a G62 in mine with scale exhaust. I kept all servos, battery, and receiver directly in the center section of the wing saddle. Here's the funny part. I never balanced it. The day I maidened it, I ranged checked it and took it off. It flew great. I never had to move any weight around.
The only way this plane would fly badly is if it was tail-heavy, which I think would be really hard to do. About the only way this plane would come out tail heavy is if you put all of your servos and radio equipment in the rear portion of the wing saddle, or by putting the servos in the tail. Even with todays light weight 40cc engines, as long as you keep all of the weight forward, you can't go wrong.