So after watching Mr Shutterbugs video https://www.youtube.com/watch?v=0P3PREMKdDc&ab_channel=MrShutterBug i had to build a 1s 75mm. It seemed like it was going to be an amazing indoor freestyle build and it is. In this build its nowhere near as light but still performs amazing. 4 min flight on 1s 300mah and over 5 with a 1s 450. Highly recommend the build. Also, running stock pids off the betafpv flight controller. On the mobula 7 frame, i cut off the battery holder and just use a rubber band and it works great. Multiple size batteries fit with no problems.