There are no walking feet on the market that fit the feed dog width of the 301. They are all too large and are designed for zig zag capable machines. They may "work" on the machine, but they aren't doing what walking feet are designed to do and that's to feed fabric in conjunction with the bottom feed dogs. Jenny clearly specifies this on the walking feet she sells for the 301. Honestly, they're not worth buying. Just lower the foot pressure and off you go.