JanieW ... I have the Janome 1600P and it has a hook bobbin case, and it doesn't take the blue dot bobbin. My Janome Mc6500 does take the blue dot bobbin. I have been advised by others on The Quilting Board that for the 1600P to use a size 16 needle for free motion quilting. I thought they were only for heavy fabrics such as upholstery and blue jeans. But I will give it a try this afternoon.