I had to modify the battery cradle slightly. The battery had to sit further back to get the correct CG.
The first photo shows the stock recomended location. But since I was using a bigger battery I had to slide it back.
The 2nd photos show how far back it had to go. The last photo is a cradle I made that the tail end of the battery slides into.
The forward half of the battery still sits on the original battery mount with velcro etc. It works good. I can get the battery in and out with the plane fully assembled without issue.