You want to be 1/3 the the way back from the -center of the leading edge ,at the widest part of the wing , to set the Static CG on the bench
A rule when the CG is not know for a given design
Measure with a tape measure , due to the curve in the airfoil
Do mark the spot on the wing with a marker
The mark will usuall fall about 1/4 to 1/2 an inch just behind the main spar , as a general rule
Most of mine are 1/2 inch in back of the spar
Farther back will make the plane more sensitive to inputs ,more foward less sensitive
Be less sensitive on the first flight
If a low wing , balance the plane inverted
Keep a record of the location ,will come in handy if future repairs are require to rebalance
Balance the plane SLIGHT NOSE down when on the CG
Do not balance it level -or it will just float on the final approach,and not develope the rate of desent as it should
Go fly the plane
I like it when making the turns on the corners , if I hold the up I desire and the plane tracks level through the corners
If the plane drops out at the my desired stick feel ( a 1/4 inch up elorvator on the TX ) , I add 1/2 ounce at a time , to the tail , until it tracks level ,as I desire on the corners
The second test is to go inverted
If the CG is right you should be holding about the same amount of down elevators to fly level inverted
Doing this gives all my planes the same general feel when they fly the left and right corners , a very good thing
Should make for a very good maden flight ,and first few flights
As a rule I work out all bugs in the plane in the first 10 flights
Be it changing the engine for more power or the landing gear to be more stable ETC.
All the above has worked for me for 24 years flying RC