Finally solved my backlash issues! I struggled with backlash even with a set of brand new UM belts/slideblocks. The internal spring doesn't seem to take up enough slack. I printed mine in CF Nylon for durability. I scavenged the bushings and belts from a set of UM slideblocks. Thankfully the S2M profile fit even though they're designed for 2GT.
Printed on Ultimaker 2+
Contribution to Beyond UMO & UM2 Slideblocks by Gudo & Neotko - GT2 Open Belt
Contributed byDavid F.