Thanks. My brother edited the vid using Adobe Premeire. No mods to the ST51. Just running a 12x4 APC and 15% nitro. The midrange is a little ragged. I was able to tune most of that out but the ST51's still are too rich when trying to quickly throttle from low rpm to wide open, just the nature of the beast. Not the greatest 3D engine, but as you can see it works. A 12x4 keeps it spinning in it's "happy" range where it has great throttle response.

Mike