Center of Gravity position

This small balsa model airplane provided me some precious information about "Center of Gravity". Small iron plate under the nose is movable anteroposteriorly, so the position of  CG is adjustable so precisely as to obtain the most suitable balanced pitching control by several gliding tests.
Now I have realized that CG position for any airplane is one of the most indispensable element to establish so to speak "Pitching balance".
I have to get back to the initial point and re-check all of CG points in the model airplanes I'm keeping!
All of the following precise adjustments should be performed after the critical accomplishment of CG!
Following my own conventions lasting long period of time, any reforms of my perception, revolutions nor progresses can not be expected.
Exactly the same is said on my business, so all the arrangements and changes by my son are acceptable with my warm and desperate assistance just only when he wants.