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It's a Meade LX200-ACF 10".
Meade calls the focus knob "coarse" focus. Given it has a mirror lock, I figured I'd use it as advised - place the crayford in the centre of its range, focus (roughly) with coarse knob, lock mirror, then focus thereafter with the crayford (which should have enough range to cater for non-parfocal eyepieces). I envisage only having to alter coarse focus again if switching to AP or from AP to visual.
Another advantage of leaving the crayford fitted is that if I end up rigging a "cooler box" to aclimatise the OTA prior to use (a nascent idea - probably using my portable A/C unit to run cool dry air into an enclosure for an hour or so before heading outside, with a digital thermometer to let me adjust the interior ambient temp), then I can cool the crayford at the same time.
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