Maybe I'm wierd... I don't try balancing at all until after its covered.

I've found the covering can change ballance enough to need to dismount the servo rails and move all of the radio gear... (I hate adding ANY lead)

So I don't put in the servo rails or drill the engine bolt holes in the motor mounts (allowing me to move the engine forward and aft within range appropriate for the plane...) untill the kit is covered and the unfinished (for length inside the fuselage) pushrods are in place.