On my Bernina I use a Bernina adapter with a viking ankle and generic snap-on feet for the feet I don't use often. I have used my old Elna low shank on my Viking sapphire. You have to remove the ankle to make it work. Or I could use the generic low shank with the Bernina adapter. There's lots of options however, I recommend buying the proper foot for your machine if it's one you'll use often tho.