Here's one that I m trying out.
They use a JR plug, and a Futaba servo arm.
Very powerful, and very fast....brushless motor and a steel gear train. They run on 4.8 to 8.4 volts.
They are quite popular with 3D flyers locally...Made in Sanford Fl., about 10 miles from my home.
THey also offer lesser torque servos too.
ProModeler - 470oz-in, Std, BLS #DS470BLHV