I have a cheap igus DIY drylin slider. It uses some type of plastic looking (I'm sure its some other material) bearings that slide over the metal. I imagine the konova is better, but for $100 is pretty good. The one problem I've found is that it makes a little noise when you slide it, but that could just be mine. Plus its not audible over the wind and skier and everything in the background. But i'd get a konova over this, its only a bit more and is probably better. Haven't used a konova myself so I don't know how it compares, but theres probably a video on youtube or something comparing them (or a thread somewhere, just google igus diy vs konova)