Great start!
Well done...
I've used various Meade SCT's in the past in Alt-Az mode.
PHD did a good job for me guiding (for spectroscopy) but I never used a combination of guiding AND de-rotation....
That may require some ingenuity....possibly a separate guide scope instead of trying to fit an OAG onto the de-rotator?? Don't know, but I wish you well.
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