Are Zippy Lipos safe with a Castle MMM Speedy?

[hemiblas]

6S and lower gearing for around 40-45mph would be a great setup and I agree some 20C 5000mah lipos would work great. I'm running 5S on my 2200 and I like it too for runtime and temps. I think 4S for an MT is an absolute min and you are at risk over overheating the motor, but not the MMM from what I have seen. Heck so even the guy with the 1800mah 25C lipo will be ok as long as he gears down and is within spec for what his battery and can put out. When I got started I bought some ebay 10C lipos, ran my calcs and thought everything would work out great. After I started testing the batteries they were good for more like 3C instead of 10C. Even someone that knows how to run the calcs and knows what he is doing can get burnt. Its really taken a lot of reading on this forum and others in addition to a lot of testing, measuring temps etc etc to really figure out how to correctly run this stuff.