I’ve found even a 1/16” change in CG location affects my elevator trim which means checking CG often, especially when trimming, changing setups, or using different battery weights. At least until battery locations are settled. Over time, fuse opening flange may crack from having 11lbs concentrated on same point repeatedly. A little piece of 1/8” lite ply reinforcement prevents cracking.

Also, translating a mark onto flange indicating backside of wing tube is very helpful. A square resting against backside of tube, mark made on backside of blade and then translated forward by width of the blade gives you location of backside of tube. Having this on each side with 1/16” graduations makes for accurate and repeatable CG measurements using a dowel (marked with line) and a string level sitting on top of flange to indicate level. Result: reduced variability from flight to flight.