My mill/drill came with 3 long handles attached to a hub that let me feed the quill down quickly. On more than one occasion I have smashed one of these handles when something tall is bolted to the table and my X axis power feed is running. Now I have removed the 3 long handles and use a Speed Handle that drops in place when needed.
For more details including a pair of videos, see
http://rick.sparber.org/rfsh.pdf
Rick
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