Thank you, thank you, thank you, Radio.
I just came in from adjusting my slide. It wasn't rubbing quite as hard as yours, but in the colder weather it was having a tough time passing the window on the front of the slide. Moved the slide back about 1/4", problem solved.
Without your pictures, I'm not sure I would have attempted to make the adjustment.
Out slide mech is an M-Tec and is a little different than yours, but the same adjustment was possible. and Yes you can adjust them up and down.
Thank you one more time!
2007 Rockwood 8315SS
2014 Silverado 2500HD 6.0L