OpenBeam Exposed Bearing Flange

I wanted to make an adjustable filament spool caddy, since my first two spools don't match spans. I made a simple flange for holding a common 608zz radial skate bearing in line with an OpenBeam or other t-slot extrusion. This through-bolt design uses inexpensive hardware, and should be easily printed four-at-a-time on any filament printer.

http://www.youtube.com/watch?v=DvV1EzdiDxo