John, I remember my cg is forward of center, other than the two 70in-oz servos for E and R. i added two oz in the tail in the holes for the servos. that wt was added after the first 10 flights, and before i realized moving the cg back would not make it fly better. sort of like dressing up a duck in studs and leather, when all is said its still a duck.

I also did a covering job like the real one would have had with coveral doped on, a number of coats of dope andaluminum and talc powder. then painted two coats of laquer. that added alot of wt to the tail, i figure i had 10oz in the tail over a std build with monokote

4oz - in servos
4 oz - in covering over and above what monokote would wt.
2oz in lead.

Joe