Thanks for the comments. I have decided to go with a 6S 25C pack and run 2 throttle curves. The first throttle curve will limit the full throttle to 80% of max battery. (I actually use a watt meter and make the watts the same as my 5S pack). l set the second throttle curve so full throttle is 100% of remaining battery power. When I then get to a certain point in my pattern I switch to throttle curve 2, giving me the extra power I need to complete the pattern. I should note that I use the throttle (and throttle curve) a lot to keep constant speed and while I may have more voltage/current/power, I don't fly at max throttle. My goal is to use the throttle management the same throughout the flight with no change in airplane performance. If this does not work out, the throttle-tech will be the second choice with the 6S pack. I have run preliminary tests and the 2 throttle curves seems to work fine.