What buttons are you using Top?
Well, technically I have stopped using "Buttons", in favor of tiny stainless steel machine screws.
They slide about 700-800% nicer than any plastic products. I hate to have to say that, because I love to order from Railbuttons, and for other sizes they are great and all, but it just is what it is.
If some rocketry related vendor comes out with an aluminum rail button for the Makerbeam size rail, or even better ACME style Rail Guides, I'll be all over it, but til' then it's machine screws for me.
I don't fly enough to worry about wearing out the rail, and these things slide SOOOO nice, that you almost expect the rocket to shoot up off the rail before ignition!!!! That's how nice they slide.
They can be a pain to get straight, but if you screw up a hole or whatever you can just fill it with JB Quick or JB Weld and try again.
I don't know what length I'll need for any given rocket, so I buy them with threads long enough that I can cut them to size when I fit them.