I wouldn't get too hung up on the mount. With a. 85x reducer you are imaging at 1.52 arcseconds per pixel. That is easily achievable with an HEQ5, and even then we are assuming the seeing is good enough.
The original question by the op was for examples of what can be achieved with the existing set up. I've been doing this for 2 years and don't feel like I've outstripped any of my equipment fully. There are always other improvements to make mostly in post but constantly tweaking and making iterative changes to make everything as reliable as possible. That means that when the skies are clear, I'm in a position to maximise the data I can squeeze out of.
Most of this hobby for me is done in the time between clear skies, always something to improve on and as the op asked for, great to compare with others and see what is possible
