I epoxied my wing & horizontal stab in to avoid what you're talking about. The loose mounting is rather cheezy if you ask me and acutally one of the mounts broke off when I tested it for soundness. Wasn't very sound as it turns out. But they make a great "stop" when mounting the wing and horizontal stab in place.
I had to play with the CG on mine as well to find where it handles best for my style of flying. But that is pretty typical on any plane. Battery placement was not ever an issue but then again my wing is a little higher up than the Cap's.
All in all, I like my Buddy even though I will not get over the BS advertisement of the AUW on these planes. I have a problem with FALSE ADVERTISEMENT - so shoot me!!!!! This seems to be an "accepted" aspect of this hobby that should not be accepted. You'll notice that none of the distributors for this plane have chimmed in to defend the weight issue.............'cause they know that we know they are full of crap.
I don't mean to rant here, but I'm still PO'd over this.
Enjoy your bird!