RE: Are My Calculations Right???
You always balance with an empty tank. If you balance with a full tank, as it burns off, you are going to a tail heavy mode. While It may fly fine on take off, it will be badly out of balance at landing. If your tank is centered over your CG, then it doesn't mater if you balance full or empty. Pattern guys use pumps and put the thank back over the CG just for that reason, it flies the same at the finish of the flight as it did at the beginning. You don't need to worry about a full or empty tank if it is an electric.
Don