Chad, the problem is that as far as I can see the C rating seems to be a marketing thing. I haven't been able to get anyone to define how it is established. I have heard that the cells rated high have had poor life and I agree that is not what I want. Consistency is all important in pattern (as we call it in the USA). I noticed in Chris Moon's data, the TrueRC 5000s rated at 10C, had better performance than the FlightPower so that is why I bought them. So far I'm happy with them but a lower voltage drop under high current would help them run cooler and I'm guessing improve everything including their life.
I agree we'd like better efficiency in the motor. I assume you are happy with your system as I recall you had great performance. Do you exceed any ratings? I think you have given us your data in the past but I don't recall if you had temperature included. How hot does your motor get and how hot is too hot?

Steve, I'm thinking that I wasn't really flying a typical pattern as I was stretching up lines just to see how the motor was performing. I had a couple of altitude peaks of over 900 feet. I'd hope that I'd manage the power and use roughly the same capacity just as you mentioned you do with your 25C Enerland pack.

As far as rpm, remember the Spin is reading the peak which is probably in some unloaded condition like pushing over the top. I'll get the rpm on the data logger going and we'll get a better idea of actual performance and maybe we can extrapolate to what it would be with better batteries. I couldn't use my regular spinner on the 11T because it doesn't have a tapped shaft for a spinner bolt. I put a smaller spinner on it and I knew the optical pickup was right on the edge, but it seemed to work in my garage. It didn't in the field.

More to come, Jim