I have 3 sewing machines and 2 sergers. The sewing machines are threaded for: Juki: piecing/free motion quilting, Sapphire: Decorative stitching, Old Singer, general sewing. 2 Sergers, one threaded in dark colors, the other in light colored thread. I use all of them. Good thing my chair has wheels! I jump from one to the other, works out well.