What techniques can be employed to build a low-profile sliding door/wall? I'm looking to build a sliding door or wall that doesn't use the defacto "sliding door" parts, 2874 and 4511.  These parts are almost usable for my design: they are thin and have a built-in stopper when using the corresponding "door rail" parts 32028 and 4510.  Unfortunately, they are too tall.

Is there a technique to slide a plate, tile, or panel without resorting to using part 30586.  I don't think I have the extra width needed by this part in my design.
Have you tried using "bricks with groove" ?

https://www.bricklink.com/v2/search.page?q=brick%20with%20groove#T=A