Flown my P3 a couple of times now and wow what an improvement on the P2 ! Just a quick question. I'm running the battery down to below 5% before I recharge by letting the P3 run with idle power on the ground. At idle power the motor rpm does vary slightly and at a certain rpm causes quite bad vibration and shaking of the P3. Just a small power input causes it to go away. Anybody else noticed this ? I've never seen this before on any of my previous Phantoms or the Inspire. Maybe the props need balancing ??