Over the weekend while bench testing the X650 V8 I noticed one of my motors was running way hot...where the other seven were not even a bit warm. Noticed the top motor above the hot one has the motor can completely detached (glad I found this out before a test flight). After taking the top motor apart, I find the e-clip that holds everything together missing...you can only guess now why the lower motor is running hot. Take the bottom motor apart to find the clip stuck to the magnet side and a significant rub scar along the motor. Everything was put back together and tested again...everything seemed okay for the moment without props. As the craft in the air, the lower right does not spool up like the others. Eventually it kicks in but cuts out intermittently at around 25% throttle while the others are still humming along. I was able to do some test flights but the craft would dip and favor the rear right side. Obviously the motor has some damage...enough to where I won't fly with it. Getting a replacement motor via CNC Helicopter (Who I might add promptly took care of this...KUDOS!) but as the title suggests...I'm looking for opinions on after market replacement motors for the future? Which ones work and fit the stock mounts on the X650?