Since I got another machine, I wanted to make sure I kept the feet separated. I have a square magnetic bowl you can get at any sewing store. It fits in the tray that came with my 401. For my newer Singer I found a long narrow (3 1/2") magnet that fits just right into the accessory tray. It's very thin. Anything small and metal goes into a magnetic bowl (from Harbor Freight). I have a lot of magnets around but at least they're not going to shift or get carried off by little critters who like to loot.