I have owned 4 Facetron sliding transfer blocks – for a reason. The bodies are made of soft extruded/milled aluminum, while the two slide rods are of a harder anodized material. Wear is inevitable. Also, I sometimes put them in the oven to do a baked epoxy transfer (180 F). The materials seem to expand at different rates, causing the holes to enlarge very slowly until some wobble develops after multiple uses.
I should check in to Zane’s blocks.
