I have a Singer Featherweight too and just love it. You really need to have the book for it though because it gives you a good insight on the proper threading, cleaning, and oiling. After putting the bobbin in the bobbin case, you need to pull the thread through the slots and hear it actually snap into the last slot. When putting it into the machine, move the handwheel so that the take-up lever and needle is in its highest position -- the bobbin case will actually snap in place then. Hope this helps.