version 2.0 Igus-filament slider blocks/pads for D-Bot X/Y motion system

This is version 2.0 of the Igus-filament slider bearings and carriers that I posted in their original version as: https://www.thingiverse.com/thing:2373538

These carriers and pads replace the mini v-slot wheels that the original D-Bot plans specify to ride in the v-slot grooves as part of the D-Bot's X/Y motion system. The pads are designed to slide over both the outside surface of the v-slot rail, as well as fit closely into the v slot itself. The carrier blocks are designed to fit in the s