I love this holder but I noticed one potential flaw. After using this filament holder for almost a whole spool of PETG, I noticed that where the filament touches the half-circle holder before it goes through the hole, the filament has cut a groove in it from the friction. I am kind of surprised by this since I used ABS for the filament holder. I think it is from when the extruder makes quick movements which in turn quickly moves the filament. Anyone experience this?