My balance is safe with no fuel…tested that. It was just an easy reference as we hook our fingers under the turbine opening side lips and lift. Hatch has to be off. Easy to eye ball down to the rear of the tube.
People fixate on balance, just go and fly with it close to the spar, if you know what you want from a model you will adjust to suit. Most just fly how it is anyway if it does not bite them! It’s why people have flown CARF Vipers so nose heavy for so long…