I use:
Prom M120
Bearing piston head
bearing spring guide
11.1v 15C 1800mah lipo
HornBill MOSFET from RSOV
No motor whine at ALL! you know that "thump" sound you get when the spring is already compressed and you just release it? That's all the sound I hear! Oh, and I'm using stock CYMA gears too(reshimmed)!
It's honestly the most amazing $30 I spent on AEG upgrade ever haha(From Ehobbyasia

)
http://shop.ehobbyasia.com/upgrade-p...mpson-aeg.html
I'll take a video by next week