Re: Preventing Pier Crashes
I've been using NINA to image with my AP1100 (no encoders) in my observatory. I connect NINA to the APDale Ghent did a great writeup on using NINA with A-P mounts. If you haven't read this yet, please take a look:
If you do not desire to have the scope image in counterweight-up positions, you can just enable meridian and horizon limits in APCC and set the limit actions for each to "Stop Tracking. You don't even need to configure the limits. This will protect the mount from pier collisions.
If you want to delve more into setting limits, take a look at the sections in the APCC help for Meridian and Horizon limits. At first, setting up meridian limits may seem complicated, but it will become easy once you have done it once.