What we have done is to provide a means to enable Domestic Machine owners to quilt free motion with a template. Yes, some machines do have a small harp space and QAYG will work perfectly well as would Childrens quilts and Lap quilts.
There are literally thousands of Domestic Machines that have larger harp space and can quilt larger projects. The Bernina 7 and 8 series offer Presser Foot Pressure adjustments and when combined with our Medium Shank Ruler Foot, can quilt of a variety of batting thickness's. We found the Bernina 350 worked very well when we filmed the video.