Also, do the mounting brackets allow for
fine-tuning of the ST-80 (up-down, right-left) so that I CAN align it
to the main scope?


Hi:

Yes, most piggyback setups sold for the 80 assume you might use it as a guide
scope, and are adjustable in the same way a finder bracket is.

Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
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