Hi,
I have a Janome 1600P and a Gracie frame.
I have had some thread breading issues and big loooooooooong gaps when I was FMQ.
I've managed to solve things for the time being. The biggest problem was the darning foot that originally came with the machine was literally worn out on the side so that everytime I would turn a corner, the thread would break or I would have a gap. It was replaced with a different free motion quilting foot and darning plate. The original one just "sat" on top of the existing plate. This plate screws in.
I did get a list of do's and don'ts from Janome regarding this machine if you would like a copy, please PM me.
Carole