my janome has a built in walking foot. that means, you just flip a preattached back foot down over and lock it into your regular foot. it guides the 3 layers of the sandwich thru real smooth.
i have never had to (at least i don't remember) having to rip out a binding, because it was puckered. yes, in the past, i did have a walking foot that i had bought separately and then attached to whichever machine i was using. but my janome spoiled me. i kept having to smooth, and easy my border to lay smooth, that should have given me a clue that the back was gathering a little. you ladies that use your l/4 foot and make it work, must be more gifted than me. i just bluff my way thru it all.