I started out quilting on a Grace Pro frame 10ft with the Viking MegaQuilter. It stitched like a dream for me, using any threads I threw at it. Only problem with these machines and also with the Brother 1600 is the throat space is only 9 inches so once you roll up your quilt, the roll takes up most of the throat space. As I had it on a frame, I added robotics that came out back then which also came up with a system that could move the rollers back and forth giving me up to 17 inches of space but it rarely worked for me. So I moved up to a stretched Juki 98Q which gave me 18 inches of throat space. Sorry to say the guy that stretched these machines wa sin bad health and I'm sure he no longer does this kind of work. I sold this system (frame and machine) to move up to a 26 inch Innova and it's 12 ft frame. But this changing along the way gave me time to see if I even liked to quilt so it was good for me. Since then I have moved over to another robotic system called IQ which was similar to the 1st robotic system I had started out with PCQ/MQR.