Saw this this morning, thought it was worth a look for someone who is considering the upgrade.
I did it to my unit, seems like much less noticeable run-out on the drill chuck.
http://www.ebay.com/itm/Shopsmith-heads ... 8055549028
Double bearing quill upgrade-Cheap
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Double bearing quill upgrade-Cheap
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Hiding in a Joshua Tree.
Hiding in a Joshua Tree.