This model has a pretty impressive glide, so you do indeed need to have your engine idle at a minimum and to hold the flare until it has well and truly stalled. Otherwise it will bounce as you describe. Take Don M's suggestion from above and dial in some spoilerons, about 3/4 inch up with the ailerons. You will still have plenty of aileron control and the landings will absolutely stick. My CG is at 6-5/8 inches, just slightly aft of the recommended CG of 6-1/2 inches.