operation fix mc10

[ted johnson]

If you put a thin Dremel cutoff wheel in the high speed drill press, lay the thick ring on the drill press table and adjust the table height so you cut a groove right around the middle of the face of the ring, leaving two "rails". You reduce the wall drag by a BUNCH. The groove also retains oil. You just get the table at eye level and rotate the ring gently against the cutoff wheel by hand. I have prepared PP AH82 rings this way for Hank Rotroff. He calls them "Johnson rings". They have run very well for Hank in the past. Ted