In GCC you can define the safety limits of the mounts for RA. Now I have it set at 99deg west, it will beep at me when I get within 5 minutes of the limit and stops all together at the limits (about 10mm from motor), but still lets you recover by reversing out without jamming up the system and causing a restart.
As long as you start at CWD then it knows where to stop.
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