APM / HKPilot 2.5 Arducopter External Compass / Magnometer Loiter & RTH Test

I’ve always been a Naza fan-boy but when HobbyKing launched their super cheap APM 2.5 clone I thought it would be rude not to order one! Initially it flew like a pig but it was all due to the internal compass suffering from shielding and interference from the frame, motors and ESC’s. I ordered a HMC5883L external magnometer/compass, made a wiring loom for it and now the quad flies like a dream! (ebay Item Title was: “2pcs Power supply:3V-5V HMC5883L Triple Axis Compass Magnetometer Sensor Module“). Yest