I didn't have to go that far back to get my CG. Those are pics from some other EdgeHeads here on the thread. I'm sure they will see their build and report back.
Mine is held in place by three zip ties. I glued and screwed a small hardwood stick across the rear fuse inlet to use as a secure hold.
The pic is before I did the maiden flight and made the changes like the nylon LG, etc. But the battery remains the same today.