just thought I would update you....I live at altitude so planes/helis are a bit harder to get lift in general. There is something I realized about the auto rotation gear which took me a while to figure out (only because I am n00b). Because there are more teeth on the main gear you can't get nearly as much head speed. Since I live at altitude this is such a problem that you can't even get the heli to hover abover eye level. It took me a long time to figure this out since I don't typicly fly that high anyways yet. I will be switch back to a stock gear this weekend to get that extra headspeed. I want the ability to auto rotate, so I may do the modification as stated on blade cp repair's website. Just thought I would let others know that you do lose quite a bit of headspeed with this gear, and if you live in a place like where I do this may make it become a pretty poor flyer.