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Hi Scott, also from learning the collimation process myself with a collimation tool and laser, I found that the laser may have a bit of slop in the focuser when tightened with focuser/eyepiece screws.
So.. collimate to the pri.mirror center spot as well as you can, and adjust primary mirror for final collimation. Then rotating the laser in the focuser around the slop, you'll be rotating a circle with the laser on the primary mirror(looking down the tube opening of course). This will help you know how and where to tighten the focuser screws to roughly have the laser centered in the focuser. Then adjust primary, etc again to get the final beam centered.
Checking with the cheshire/collimation tool after this lets you know how close you are or what final adjustments are needed.
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