brushless motor control is very complicated,
you have to pulse each of the three different wiring looms to get movement, and then you have to read the electromagnetic backfeed in each loom while off in order to get an idea of speed and timing required,
thats my underrstanding, i decided not to bother, and just bought some cheap ones,
a brushed speed controller is easy to make with an old servo and some transistors to beef up the power supply