@QuiltE it wasn’t much of an adjustment that I can remember but we started using them several years ago. If you have doubts you could use a homemade solution just to see if you like it. You could use a piece of plywood and put your machine on a piece of shelf liner, and hold the back up with books or something else. Or if you are or know a woodworker you could build a stationary one like mine - the design is fairly simple.