Hello I bought a flitetest gremlin that one of the founders, Matt, had built for me at flitefest 2019. The quad was great and zippy for a few weeks but then began getting sluggish and have no punch. The batteries are not the problem because I use them in other planes and they work great, and charge fine. The flight time is still multiple minutes, but takes around 80-90 percent throttle to keep it steady or gain altitude. Its main problem is speed and punch. Also i’ve tried 3s instead of 2s and doesn’t help much. I have the controlled binded correctly and the settings as far as I know are correct. Anybody have thoughts on this?