They look interesting but a bit oversized for featherweights. The 42mm outrunner is about the best fit but its low KV and 22V limit makes it a bit low revving for my taste. The high voltage car ESCs also look interesting, they are the first I have seen that work up to 44 volts.

I wonder if Alien Power would consider a custom sensored outrunner for the bot community? A 35mm motor with a KV of about 1000 and a 22V working voltage would work really well with a Banebots P60 26:1 gearbox.