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As George alluded to above, the add-on helical focuser is great - here is mine added to a SW 9x50 used as a guidescope (note the Lodestar inserted in the focuser). This is the direct to tube version - no adaptor / stepper required. I note Aliexpress sell them for $55 AUS, post extra.
I got mine for around $60 delivered. No need to mess around shifting the guide cam in and out as the helical focuser (non-rotating) has a good amount of travel.
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