well that was a sweet little doodad! i finished a shirt i was making with buttonholes down the front using the attachment. they came out pretty nice. i'm remembering all the buttonholes i've made on my 503a using the zigzag, drawing out the center line with a ruler, going down one side, making a bartack, and repeating on the other side.
and i loved using the FW for it.
thanks again for your help.