With all this hoop-La concerning weights, here is a tip. At the local fishing/outdoor supply, you can find nice flat round lead weights, marked in oz. They have a small wire loop, but ignore those loops as they will pull out if you use that to attach the weights.
Drill a hole through the center. The local hardware/home supply will have bolts or threaded wire in long lengths. Usually 3" or so, 6-32 to 10-24, or whatever turns you on. Bolt on these weights and you can adjust as you get the flying to where you want it.
Most of our machines, except the long fuse aerobatics types, have a normal 3/3.5 to 1 force arrangement. It takes 3 - 3.5 oz. in the nose to offset 1 oz. in the tail and vice versa. Just did a machine that should have the elevator servos in the wing saddle area but I just had to put them out in the air back by the tailfeathers. 3.5 oz. of servos cost me 12 more oz. weight in the nose.
Nah, I ain't redoing it. Looks Cool!