Robert,
You can't fit both a Feathertouch microfocuser and a Hutech focus lock - the microfocuser does most of the job of the focus lock.
The mirror shift is tiny - so it isn't effecting focus - focus isn't my problem - its affecting where the star appears - if its wandering a few arc seconds left or right, up or down - this is throwing out correct drift alignment adjustments. So if the mount is a tad off polar alignment you'd expect point and therefore tracking (which is just real time pointing to be off).
Matt
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