@Bill I'm actually seriously asking here, what does that piping foot do? I know you're newer at this, so the difference between it and the zipper foot may have made more of an impression on you. I don't understand what you were saying about the "¿side to side?"movement of the needle. :thinking:
Do you mean if you can change the needle position on your machine the piping foot makes things easier??? The one feature I have missed on my Janome (2 or 3 times over 30 years), that was on my first machine, is being able to move the needle position. Mine doesn't do that.
I bought a set of those 32 sewing machine feet for $18 from Amazon, before all of the feet were individually listed on the website. All I really wanted at the time was a felling foot, and of course that wasn't included in the set. There is a piping foot or two, but I've yet to play with them as they don't work on my main machine.(I'd have to futz with drilling out all of the openings for my needle to clear properly.) Could possibly use them on my Morse, but there are too many other things above that on my "to do" list!