After a number of attempts to resolve a problem with guiding, I determined that some severe backlash in the DEC axis and some moderate backlash in the RA axis is probably the cause. Although gear mesh adjustment would help resolve the issue I decided to do a complete overhaul of the mount by performing the HyperTune procedure from Deep Space Products.
This service is provided by DSP but they also provide a DIY kit, and I didn't want to wait the 4 weeks for the turnaround. So I ordered the kit earlier this week and spent all day yesterday doing the tune up. Here is a before image and the disassembled mount.
After the rebuild was complete I set up the mount on the pad and made some final mechanical adjustments. The axes are now silky smooth and the backlash in both axes seems almost non-existent. However, the proof is yet to come when I test the mount later this evening with the OTA attached. Now I just need the skies to cooperate.
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