This
Multiplex Servo Mini Polo Digi 4 servo has all the right numbers on paper to be an excellent 1/12th servo:
Digital, metal gears, single ball bearing, lightweight 0.77oz, 49oz-in torque, 0.08 seconds at 6V, 1.1" x 0.5" x 1.3".
Does anyone have any experience with this servo? It does appear that Tower's web site is wrong about dual ball bearings. I think this is the
official web site for the servo, and it says single bearing.