I have owned one now for about 2 months. I was extremely disappointed when I realized that you need to take out the gearbox out of the gun for the "quick change spring" to work! Having said that the gun has a great finish and shoots great out of the box. The gears were nicely shimmed and produced a loud but low pitch roar. It comes with a corrected A.O.E. and pre-installed sorbo pad. The integrated mosfet is a nice feature as it is built into the gun but, it does not include active breaking or any type of pwm. I have heard rumors that other gear sets might not be compatible due to a relief c
