I started out with a Grace Pro 10ft frame wi th my Viking MegaQuilter 9 inch. Moved to a Stretched Juki 98Q machine a couple years later with no problem at all. I know it will take the Brother 1600 and a couple more of those machines that came about the same time as my viking did. Great frames but I did change out the poles to conduit and the rails to a metal piece but that was fairly cheap to do. Had no problems selling that system when the time came either.