Thanks Steve
that's good enough for me! I presently use Rack & Pinion so probably won't notice if there's no Crayford. Besides R&P has been the mainstay for about the last 150 years or so.
Think I'll be paying Telescope Shed a visit as I also learned that the SkyWatcher has a patented Tension Control handle which will be useful considering that I need to adjust the counter balance weight on my Optex every time I switch between my Hyperion and Plossl eyepieces.
Looks like my plans are going to change.
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