I'm running an LA 25 with muffler on mine, I added a Dubro Heavy hub too. I don't know where the balance is but its now a little too stable. With just a normal hub it was twitchy as a mug. Also have an oversized control horn on the elevator not that real close to the center stock Ring horn. Still, if in level flight it's always hunting for a new home, it's too tail heavy. Weight to the tail of such a short nosed plane? But yes, CL planes generally have their CG's farther forward. Looking at a Magician and the plans show 16% for CG. That's a pretty active stunter, least the one I flew. I bet my Ring is closer to 10-11 right now. I can get squares out of it, not triangles.