Thanks to daylight saving, when I got home tonight at 7:30 it was still just light enough to squeeze in a flight. All I can say is, brilliant!
I'm using a 12T slant pinion (121T main) in this heli with a Align 450M (3500kv) and in idle up 2 I'm running a 95% flat throttle curve. Even at this RPM the heli was super smooth, and super powerful. I swear it seems like it has a lot more grunt now. With a 2200mah 3S 50C battery it was a rocket on near full collective.
I flew the tail as close to my face as I dared (luckily it was very calm). There wasn't the slightest bit of vibration and the blades looked to be tracking perfectly.
A big thumbs up for this product. All of my 450's will be getting one of these.