I read an article awhile back that explained the difference between IDT and a walking foot. Although the end result when sewing two pieces of fabric together is similar, the mechanism by which it is done is completely different. If I can find the article again, I will link it. What I came away with from that article is that a walking foot is better for quilting than IDT. Does Pfaff sell a walking foot for their IDT machines? I don't know.