Alright, procrastination is over. Mount has been removed from pier and ready for a service and check up. There is something not quite right inside and it's time to find out what. Tomorrow I will start the disassembly.
Hopefully I find an easy to fix problem that will reinstate decent guiding, and allow me to get back to imaging. I have missed quite a few good nights trying to solve the guiding issue and then procrastinating over stripping the mount and servicing it. I'll report back any findings.
Ideally I would like to upgrade the NEQ6 but alas funds (read Minister of Finance and War) wont allow it at this time.