Slideout adjustment

My slide is a single ram type, a geared rack underneath moved in/out by a pinion geared motor. There is some adjustments possible where the rack attaches to the bottom of the slide. But I had more luck adjusting the nylon (?) blocks that the slide floor runs on. These are located on the trailer's main floor. I added a couple. Raising these a bit on one side forces the slide to shift a bit to the other as it moves out. Before doing that I just physically shoved the slide over while it was moving out. That works too.

What kind of slide mechanism are we talking about?

Moved from General RV'ing Issues forum.