The one I'm having problems with now is the adjustable bias tape foot found on Amazon and other sites. I can't keep the quilt binding feeding straight. The foot has a top groove and bottom groove which the tape edges feed through but as they're sewn through they keep sliding out of the grooves. Also it seems the opening where the quilt is sandwiched between doesn't want to open far enough and the quilt works it's way out of location. I don't know if it's me or the foot. I would sure like for it to work so I could use one stitch around the quilt and it would be bound. If it's me and any of you use it successfully let me know your technique.