Hi fellas, I just bought a Gorton model 375-4 . It is missing the "centering arm" listed as "o" on page 5 of the manual that was supplied, didn't notice till I got it home. I'm not sure how important this is, I could probably make one if I had the critical dimentions. Also missing the "needed extras" in Jim's link. The grinder seems to be in decent shape but is in need of a good cleaning. Can someone tell me where to find the serial no.? Hoe about a sorce for the parts/ accessories? Thanks oscer