Ansen Style Slot Bearing holder for 52mm Spool

5-22-2014 Edit:
I made a repair (I think) to the design file and produced fresh file versions, plus a ready-made profile for Replicator 5th gen with the following settings:
-Standard quality
-.25mm layer height
-2 shells
-5% fill
-230c temperature.

I hope this will work better for Slic3er, but again, I don't have any real experience there.

5-21-2014 Edit:
I updated the design files with a larger center hole on the backside to clear the moving part of the inner bearing race.