Thank you Kalama for getting back to me.
I took a picture of my hand crank on my class 15, the same crank fits the same on my 66.
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You can see at least 1/4 inch between the bolt on the finger and the stop motion knob
On the bantam the bolt for the finger hits the stop motion knob and binds up the crank.
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You can see how it has marked the chrome.
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I'm at a loss to figure it out.
The hand wheel is a singer 9 spoke. You mentioned cannibalizing a different handwheel.
My question is how much room was there between the finger bolt and the stop motion knob?