Hi Bruce, I`m trying to find some info on the heli version of the ASP 52 that you reviewed, but it`s scarcer than hens teeth. Managed to find a video on you tube <http://www.youtube.com/watch?v=HLl0tzQeTDA&feature=related> where it seems to fly the trex 600 ok but can`t make up my mind if its the pilot pumping the throttle or the motor itself. If you get time can you give it a scan and see what you think. It has a quoted output of 1.75bhp but I`m a bit dubious about that as that carb looks a bit small. Anyone else out there tried one ?