I have 2 generic walking feet. They both fit on all 3 of my Janome machines and work just fine. Also if you want to sew in reverse drop your needle, turn you project around, stitch as far as you need to, drop the needle again, turn the project around and you have backstitched as desired. I don't want to use my walking foot to stitch in reverse in case it does hurt the foot. Even the generic feet are not cheap.
Sue