South Bend 9 Steady Rest What Missing

Also note that even a QCGB requires at least 1 additional stud gear to even use the whole chart. See this one I found for a 9A: https://www.practicalmachinist.com/...-part-1-removal-disassembly-index-plate-1.jpg

In order to get the top row, you need a 40 gear tooth on your stud-gear. Everything else uses a 20. Once you recognize the relationship between the two rows (stud gear ratio is the same as gearbox ratio!) you can discover a bunch of new options!
 
Also note that even a QCGB requires at least 1 additional stud gear to even use the whole chart. See this one I found for a 9A: https://www.practicalmachinist.com/...-part-1-removal-disassembly-index-plate-1.jpg

In order to get the top row, you need a 40 gear tooth on your stud-gear. Everything else uses a 20. Once you recognize the relationship between the two rows (stud gear ratio is the same as gearbox ratio!) you can discover a bunch of new options!
Yep. I saw that and have both the 20 and 40 tooth gear plus extras
 
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