Grev said:
The TRACKTOP™ by TRACKTUBES™ uses a piece of 1/4" MDF, cut to be a friction fit. I actually use painters tape to adjust the height up slightly if needed.
I would note this observation:
I built several work stations for my picture framing business. When I closed that, I moved some of the work stations to my basement in my home.
Several featured, basically a workbench height box made from particle board. Top and bottom I made slots to accommodate vertical dividers to hold mat boards. These were on 2” centers and the dividers were removable, to accommodate different colors of mat boards.
After moving them to my basement the
humidity caused the particle board to swell slightly and probably the tempered hard board dividers. Where they used to slide easily in and out, they are now permanently installed. I’ve even tried clamping on two vise grips and pulling, but they might as well be glued in place.
So, if you put a cut strip in, I would remove it frequently to check for fit. You may have to sand the strip slightly to prevent it from “welding” in place.