Originally Posted by
miriam
I have an old red eye with no boss - I made it into a 1 x 1 ratio HC for my grand daughter. She has some vision problems and this is much easier for her. I got the part at NAPA.
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This one has one revolution. The usual HC has 1 revolution and 3 stitches. The 1:3 turns backwards. This one turns toward me. It did not need a machine boss. The machine does not have a boss but someone did drill a hole and tap it for a bolt - the regular Chinese HC will not fit - it needs the raised area to work the Chinese HC.