wilson10: the HS-225MG would work great in a 12th scale...
I use one in my SPEC NASTRUCK...
Specifications:
Bearing Type
Top Ball Bearing
Operating Voltage: 6.0v
Torque
oz\in 67
kg\cm 4.8
Speed @ 60 degrees: 0.11
Size L x W x H 1.3 x 0.7 x 1.3 in.
Weight 0.98 oz
1.13oz (MG)
27g
32g (MG)