I'm so happy for you to have a machine to experiment on trying to fix. I want to do one too, some day, but at the moment my hubby says 'NO MORE MACHINES!!!!' But on the other hand, he will look at machines at flea markets to see if they have attachments I might want. If it is cheap enough, I can pay for it and just take the attachments that I want, and leave the machine! I did that with my Singer Pinking attachment and the Hemmer and picot attachment. I got them with some bobbins and other attachments and paid $25.00 and left the machine. I did put a bobbin in the machine when I left it. Now it is listed for $20.00.
My hemmer and picot attachment has the cover needed for my 99, and now I want a cover for the feed dogs for my featherweight. Does anyone know where I can get one? I can't afford to pay a lot for it. I also want a zig zag attachment for my FW.