[Moon] azimuth motors

[Ross]

Now I am gradually starting to get things organised, I would apprciate some help on the azimuth motor for a 4.5m dish.
(Elevation I will use a linear actuator.)

For the azimuth drive a prop pitch motor would probably be ideal, but good ones are probably like hen's teeth.
 So advice as to what I should do, what size of motor do I need should it be  DC or AC, gear box does it need zero back lash etc.
Final drive from the motor to the dish drive shaft etc.

All info very gratefully accepted

Thanks
Ross
ZL1WN
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