I opened it up and the rollers were full of gunk, and when I cleaned them off, they still had a worn in line that I could not remove.  So I cleaned it up, oiled the bearings with the 3-1 and put it back together.  I left the screws a little looser this time, and the thing is now quiet and works a LOT better.
I took some pics of the grime, but I don't have them here at work.  I'll try to remember to load them up tonight if anyone is interested.