PhD advises you to have calibration within 10 or so degrees of Dec =0. Also you should be a few hours off of Polaris in RA. Something like south east at 90-lat altitude is good.
In practice things work pretty well so long as you are not near the North Pole.
Glad you got it going
Wes, Southport NC
PMC-8, ES ED 127, 10" LX200GPS, Astro-Tech 8" Newt, ETX-90
Polemaster, Orion ST-80 and SAG
Electrical Engineer, Retired