I have the 9 in which I use for all my piecing it is not on a frame, I love it for piecing but not a deep enought throat for me to have on the frame. I had the 18 in on an imperial frame, was a good machine but not happy with the frame. I now have a Babylock Crown Jewel on a Pearl Frame. I love it. Innova is also a wonderful machine. I would suggest trying as many machines as you can before you invest.