Do all the above, but use the CG suggested by the manual. If you dont have a manual, the CG is usually 28 to 30 % of the wing chord measured at the fuselage from the LE.
Or....U can do as I do
Tie a rope from your deck to the back fence very tight......hold the plane in your hand like a log.
Walk on the rope from the deck to the fence without falling ....hehe that's it...you're balanced