You should consider making a jig that will balance the plane under the wings. This way, you can find the planes "natural" C.G. by moving the plane forward and backwards on the jig. You can then decide to add weight or remove. If you have a good sized plane like that F-22, taking that weight you removed, and placing it exactly on the C.G. will be adding weight to the aircraft, and it is kind of a "battery" or sorts, A As it weights more, you will be loading the wings more, making it fly through the air, with the extra weight needing more force to throw, it will be returned to you by distance. I used to make some gliders so light, you could not get any distance because you could not throw them hard enough. I would have to use a rubber band, or toss them from a very high building to get those super long, sometimes lose the plane, flights. If you make the jig attached below, make 1/16th flats on the top to make it easier to balance the plane, adjust the variables as necessary, (in other words, make it as big or small as you need). It's good to have the balance points on the same plane of reference, which is why I always attach it to a plate, which is what the blank square is. Rule of thumb, start 1/3 back from the total lift area of the wing's area to find the C.G. Try to make the center of lift just beind it, so it will always fly slightly nose done, when it has finished rising, then it
won't stall.