Just thought I would mention, if you are looking for ideas, spend an hour or so in a hardware store. Not home depot a good large hardware store.
I have principle that what ever I build should be supportable with locally parts and not have to buy or make buckings or what not.
Case in point I wanted to find new material for a fixed hop up. I have some but it was not working for me. So I took a stroll through my favorite Ace Hardware.
Check this out. It is very high friction and is flat and easy to cut to length. Not sure how tough it is though but I suspect it is tough enough. You could also find super tough rubber sheets in red that is 8 inches x 8 inches and 3/16 thick and is used to make plumbing gaskets.
Sometimes material leads to ideas believe it or not.
Sorry about the lighting.