I agree, the mmax pro and SCT 3800 is a great combination for this truck. Extreme overkill and if you gear it down to control it there will be no heat. The next best castle option is the 1406-4600.
I took my buggy out for the first time. It is pretty cold but I managed to still enjoy it. It looks like it goes about 40 and no more and it has typical overkill brushless power. The motor was extremely tight at first and it started to loosen but It was only run for ten minutes or so and its still a little got a little more to go.