It may be kind of fiddly to wind the bobbin but you need to remove the top screw that is used for adjustment.
https://dragonpoodle.blogspot.com/20...and-crank.html Keep it in a safe place with the machine. If I'm understanding it correctly you may have to hold the arm to make sure the bobbin winder tire is riding on the hand wheel.
Janey - Neat people never make the exciting discoveries I do.
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