I just finished building a Tarot 650 and I'm having an issue. I'm using sunsky 600kv's with 13x5.5 props. After finishing the build I attempted a hover check and the quad did a quick nose dive before getting off the ground. My first thought was I must have a motor or prop reversed, but I've check multiple times now and that's not the case. After rechecking everything, I decided to hold the quad on the ground and run up the motors. Everything felt fine until I let it start to tilt in any direction, then it seems to over compensate trying to get back to level. Gains were at default for the first attempt then I lowered them thinking that is what's causing the problem. Any help would be great!