[Placidus (Mike and Trish)]

Coming along nicely.

Two things that can cause the hunting: too much guider gain, and incorrect balance. One wants the balance to cause the scope to want to move ever so slowly to the east when you release the clutch. If it wants to move to the west when you release the clutch, you'll get east-west lurching.

A rare one: When our MI-750 fork mount was first delivered, it suffered from another cause. It was built to work in the Northern hemisphere. In the southern hemisphere, the RA worm gear would climb up the face of the big bronze RA gear, and then slip back down again. In the Northern hemisphere this did not happen because of the way the pressure loaded worm carriage was built. Rather than sending it back to California at enormous expense, we modified the carriage by adding some additional bearings to hold the carriage down. That fixed it.

Best,
Mike