Last month I went to the Ninigret quilt show. It was in a an old Armory. Several of the quilts were draped over antiques and it gave the show a charming feel.
One of the vendors was selling Featherweight parts. He had a zig zag attachment and I had been looking for one, so I bought it. I set the Featherweight up to do some zig zagging on the Nutcrackers. It's the first time I used it and it took a few minutes, but after that - it was a breeze.
It sews out a different looking zig than my regular machine, but it's fun to use and breaks up the monotony of all that zigging. The foot moves the fabric from side to side as opposed to the foot moving from side to side.