Just test the performance in this maiden flight using Little Bee ESC 20A and RCX 6030 Props and changed the motor timing to: Medium Low with RCX 2206-1950KV Motor, it flies OK now.
RCX H250 CF 3K Pro - LuxFloat - CleanFlight 1.10 Beta Release Date: September 30th, 2015
RCX H250 CF 3K Pro - 280 size
RCX 2206 - 1950KV
Little Bee 20A ESC
RCX Mini32 (Acro Naze32)
BLHeli 14.1.0.3 - Damped Light
Motor Timing: Medium Low
RCX 6030 Prop
4S 1800mAh 65C
Default LuxFloat PID, i only altered; roll rate, pitch rate and yaw rate
Rate Flight Mode
Mobius Action Camera, Lens A, 720HD, 30 degree tilted