For anyone interested, I documented my recent alignment/calibration of my CU300 slider. The concepts are appropriate for all sliders.
There is an index of the video underneath it, just click on the 'SHOW MORE' link button.
https://youtu.be/x_HbyPzzhDk
I would have found this information helpful when I purchased the slider 18 months ago, so I hope others do as well.
Feel free to leave comments directly on the Youtube page, and 'Like' it if you do..
Cheers,
Mark