I've been waiting for my receiver from Lemon RX for over 3 weeks now, and with the weather cooling down, I really want to get this completed and flying asap. I decided to just buy the Spektrum AR400 to save time. 4 channels, with diversity, and weighs in at 6 grams. With this, I started testing out the servos and motors, all of which went very well.
On the motor's can, the recommended sizes are from 5 to 7 inch. I choose this motor because of this post from Crash Test Hobbies. Evidently, someone read the wrong prop pitch and got 7x5s instead of 7x6.