Attachment 297900I know Singer site has these for sale but does anyone have one for free? I bought one for $5 & everything moves, runs EXCEPT I can't get the bobbin thread pulled up. There is a knob on the front of the bed (to the left of the thread guide for bobbin winder) that doesn't show on the pictures I see online. I'd appreciate any help you could give me. I want to give this machine to a friend.