I've sure been having fun with my Westalee Template set on my Bernina 230! Which Bernina do you have?
As I understand, the Bernina ruler foot is not supposed to be used on our regular Berninas, but only on their longarm. I tried to order some for the store where I work. But since we don't carry the Bernina quilting machines, they would't let me order them.
Oh, well. We carry the Westalee feet, and they're just great. I've found that the #77 adapter shank works better than the #75. The #77 is a little shorter, so the templates don't get caught on it.
Have fun with it when it comes!