Some planes have ground-effect "float," some don't. The original Gee Bee racers were known for it.

Sometimes the solution can be right in front of us. A crusty old aeronautical engineer showed this trick to me years ago, when my 4-star style plane was bouncing.

On these sport planes, sometimes the ailerons are a bit too far down at "neutral." That can cause a flap-effect, where the plane won't want to stick to the ground. It's an easy thing to check out. Just take each aileron at zero setting, and using a clevis adjustment, or sub-trim, raise the aileron maybe one thickness of the trailing edge, and then do the same with the other side. This will move the aileron slightly up and away from "flaperon" and a bit toward "spoiler." That's usually enough to help a plane to settle onto the runway and stay there, and otherwise you shouldn't notice any real difference, other than the plane settling down a bit more rapidly from altitude.

It's easy to do, it's free, and it usually makes a notable difference. If it does, it's priceless.

Side note. CG adjustments should be far down your list of things to mess with when adjusting landing characteristics. Not saying you won't do it at some point, but there are MANY other aspects which should rightly be addressed first.

I hope this helps.

~ Jim ~