RE: hummingbird brushless setup
Astro 010 10Turn with a 10 or 11t pinion works great...
I am using a 2s lipoly etec and phoenix 10 and have had great performance and flight time about 20min. long in a hover!!!
Cheers
tomflier
BTW, I don't really now anywhere the Astro is in stock so you have to wait awhile until it is in stock. The Himax 2015-4100 would be an alternative to the Astro but I don't know what the comparison of performance would be.