" I am going to experiment moving the CG back about 1/2 inch and see if that slows her down. "

That will definitely slow it down in a big hurry when it gets dorked into the ground, looking like a lawn dart because of extreme control sensitivity.

Why not try flying slower on your landing approach? You do that by raising the nose to increase drag and cutting power to prevent a climb - just as we do with a full size plane when setting up a speed and rate of descent for landing.

Attitude controls speed and throttle controls rate of climb or descent.