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So I just recently got a C250 V2 Racing Drone and decided to get it set up with clean flight. I did everything the manufacture recommended for setup, however, I still have a major problem. The drone seems to lose its self-level over time. I'm not in manual or horizon mode because I have those...

I was wondering whether one needs to rebalance Solo (without gimbal), once he removes the GoPro (e.g. for sport flying)? I suppose that the GoPro is held on the CoG of Solo, but still it is a good thing to think about it...