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That is what I found. I always try to come to focus against gravity. I am pretty sure that the reduction in visible image shift I have seen in my scope (Which is really not very noticeable in the first case, it only becomes obvious at high magnifications) really is because you can much more easily make the last focus movements very slowly.
It may even relate to the sideways pressure issue I mentioned. trying to get the focus "Just so" at high power with the original focus knob was a matter of pinching the knob between two fingers to try to move it very small amounts, which would make it quite easy to apply a little sideways pressure at the same time without meaning to. with the FT on there you can easily dial it in with a more relaxed hand.
Now I just need to find some more time in post fire recovery to actually get it out under the sky! My weekend are pretty busy and I am pretty worn out by the end of the day most times.
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