I have a Starlight Instruments feather touch focuser for my Dobsonian telescope.
While trying to collimate the secondary mirror with the focus all the way in, I noticed that my Howie Glatter laser collimator drifts away from the center of the primary mirror as I adjust the focus to all the way out. The collimator fits snugly into the focuser.
Clearly this is not good as collimation is now dependent on the focus position. While I could work from the mid-point of focus, I'd rather resolve this issue.
How can I adjust my focuser such that it is aligned with the telescope and collimation does not drift as I adjust focus?
I noticed that adjusting the secondary has reduced this issue, now the drift as focus moves is more subdued, but still noticeable.