Roger, go by the consensus.... move the CG back. If it doesn't work, go by my suggestion: Move it forward !!!. LOL.
Remember, tail heavy airplanes don't want to land !!!!
In fact, the way I figure out the correct CG location on my planes, is by the landing behavior.

Also, your "slightly nose down attitude " on the approach is not helping either. As a hint: you have to always be able to "see the bottom of the wings" during the final approach. If you are able to see the top of the wings, you are in trouble !!!!

One thing is to land, and another one is to fly low and touch the ground.
Jack