Another suggestion about balancing a new aircraft. I also balance wingtip to wingtip. I make sure the wing is on straight and with equal amounts of wing on each side of the aircraft. It the wing is attached with rubber bands that can vary each time you attach the wing so I make sure the wing is on correctly and make little marks on the wing so that each flying session I can put the wing on the same.

I then suspend the plane from the ceiling on string attached to the fin and the shaft of the motor. The plane should be level wingtip to wingtip. If not a little lead in the high wingtip will make the plane fly better and not require as much aileron trim. This kind of out of balance can usually be corrected with aileron trim (if its not too bad) but its nicer not to do that especially while doing maneuvers and aerobatics.

Roodester