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Michael, that's where the dot on the secondary helps by giving something to aim at.
Not sure about the secondary? Easy. Get yourself a Kodak film canister with its lid & make a 2mm hole dead centre in the lid & base, and use it in the focuser to check for the dot on the sec. A 2mm hole is just right for this purpose.
Oh, & every time you open the back of the collimator wherf the batteries are housed, you need to recollimate as the spring will shift the laser.
For me it's about problem solving. I can throw money at things, but finding a solution is more satisfying.
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