I'm soon going to have 4 pole 24mm motors for the micros. Here is a video of me testing a 6000Kv in my Recoil:
http://www.youtube.com/watch?v=zXhGr2IuxUg. That motor is now in my MLST. I have the 7500Kv in the Recoil now, but still didn't race with it yet. The 9000Kv one will be ballistic and I'm only going to use that to test my 40A micro ESC that will soon be here as well.