Airboss has a 2A bec which should be good enough for the KMD even on the best servos out there.
Daniel Dominquez got away with a 25 A 1st gen castle creations with 1.5A bec, of course he did have problems with that esc but it's to be espected when youre running it over spec on both the bec and the motor power. I would use the airboss 35 in mine with no worries. But i did have a phoenix 45 with 3A bec so guess what i am using
nothing wrong with a bit of well placed overkill!