Sorry but I deleted the message before I rssponded, but would that attachment you added be for a far right side on and off lever? I added on to my JET up at the head portion as well as at the tail stock end, as it always made it more convienient to start or stop the lathe.
I see your shear pin goes in paralell to the shaft in the collar, where the Jet and S-M goes thru at 90 deg to the shaft . Visit my website:
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expressed are those of my wifes, I had no input whatsoever. Remove "nospam" from email addy.