Pocket Filament Reel Rollers - thin version

I liked Airtripper's Pocket Filament Reel Rollers, but don't wanted to use four bearings per part. So I made a shortened version of his design. You need one of the original files and one of the shorter ones from me to make a thin version of the stand.

(The change was done just by cutting some parts of the original file in 123d Design - sure it's more elegant to use the scad data to make the changes but I didn't figure out how...)