@Arct1k: Yeah, but building it is more fun.
Seriously, I wonder how hard it would be to use a rotary encoder instead. In an R/C, a little throttle signal "drift" is acceptable to a degree, but not for personal transport (safety). An encoder style adjustment would be more resistant to wear and value drift.
@Maciolus: You are making the assumption that the CC fan has a higher airflow output because of the higher power. It probably does, but there is a point where faster airflow doesn't help as much as you would think. Just getting
any active airflow is a HUGE help, but increasing it by just a few cfm's will provide marginal benefit.
I'm gonna wait until Castle releases the ESC/motor combos, and then remove the fan, add a larger heatsink, and remove the top part of the case to allow better passive airflow through the fins.