So I added a Walkera gimbal and GoPro, then I added an FPV board and antenna upgrade, then I added a Multistar 4000 to get some range back, then I added a Sunhans 2w booster and now I want to add a second battery, The battery rack seller says not to use it with a gimbal as the whole setup will be too heavy and overheat the motors. What is the limit to add-ons?