I too have the original GMQ. I up graded my carriage and got the best deal at allbrands.com . $99/ free shipping. I clean my tracks, wheels and sensors with an alcohol cotton ball before each use. I do have issues with the old track system only because the tracks are in pieces. New full size tracks are not available. When I hit one of the "cracks" my stitching is thrown off quite a bit. I wasn't aware that the new tracks would work on the old system. Please PM me and let me know if you upgrade and it helps! I don't check in here often enough and would otherwise probably miss your post. I have a 17" machine on my frame.