I do exactly what Tall Paul recommends only in reverse order. Very often, all mine have needed was a reduced throw.

Tapered wings naturally stall from the tips. Staight, non-tapered wings naturally stall from the root. That's one reason you see different models snap out more or less than others.

Lots of modelers tune their dual rates so that low rate on the elevator won't cause a snap-out in most maneuvers. Some maneuvers call for a snap roll. Those have to be flown on high rates. It's not a snap roll unless the wing stalls. The elevator causes that and can't do it unless there is sufficient deflection to give the h.tail enough force to push the wing into enough AOA to stall.

Adjust your low rate elevator throw to make those snap outs go away and you might not need to shift the CG. (Which is nice if it's where the model flies comfortably for you already.)