Welcome quiltwhisperer. How are you coming with the walking foot? I have an older Janome. Make sure you use the thumb screw on the left to remove all the regular foot stuff, then the walking foot should fit around the post and the thumb screw. Just make sure when you bring it up from behind, that the lever goes on top of the screw for your needle on the right side of the post and then use the thumb screw on the left to tighten everything down securely.
Good and happy sewing! :lol: