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A decent AZ mount for a 5" would be pretty expensive.
If instead of setting the polar axis of the equatorial mount to your latitude, you set it to zero, you have a mount that performs exactly the same as an AZ mount.
Don't get too hung up about using an inexpensive equatorial. Even after you set the polar axis to your latitude, no one says you have to line it up with the South Celestial Pole in order to use it. You can just take it outside, plonk it any position and use it, though you will be using both slow motion control cables to track an object (just as you would an AZ mount). If you do line it up roughly with south, you just won't have to use one slow motion cable as much as the other when you've found you object.
Regards,
Renato
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