Just when I was in the mood for sewing, my machine started skipping stitches. So trying to follow the instructions, I undid the bobbin housing and a piece fell out - eeek!! Naturally the book doesn't show how to re-assemble this bit! But I persevered and did finally get it back together but very gingerly turned the wheel expecting something awful to happen. But it's fine and I finished a couple of things for my 'stock' box. The smaller piece is made out of a vintage quilted tea cosy - I knew this would come in handy!!