Figured I'd start a new thread since I think it's pretty useless to add to the 2000+ post mess that already exists.
I don't see many people running APM for a flight controller so I figured I post my results with it.
I think I have it tuned pretty good now after a dozen flights or so. Put it to the test yesterday in 20mph sustained, 30+mph gusts and it held solid in loiter and came right to me in RTL. Very happy with the power and feel with this setup, plenty of power even at 6600ft ASL.
APM2.5 w/ Ublox LEA-6 GPS (awesome GPS!!)
ArduCopter firmware: 2.9
Motors: T-Motor 2814-11 / 710kv
ESC: RCTimer SimonK flashed 30A
Props: Graupner 11x5
Batts: 4s 3300-4500mah
Attitude goggles w/ 5.8ghz Rx/Tx
Video link: http://www.youtube.com/watch?v=EcRSN...ature=youtu.be
Here are my PID settings: Keep in mind that I am flying at 6600ft ASL with 11x5 Graupner props. After 8.5 mins of mostly forward flight, I had 33% remaining battery life with a 4s 3300mah pack.