Hi Grant,
As Nick says, the beauty of the SCT is that you can make huge changes in focus with the knob that moves the primary mirror. You need to set the Moonlite so it is in the middle of it’s travel, then go to a nice bright star and focus with the main mirror knob (you might need to loosen the mirror lock knobs if you have them). Then you can re-lock the primary (if applicable) then you can use the Moonlite from then on. Note that the star might be hugely out of focus which van be confusing. If in doubt, I use the Moon, or distant objects in the day.
Cheers
Ian.