I have a Viking serger but I can only do a 4-thread overlock, the screen is not fully operating; a Viking Designer 1 and its screen is not working (all started in 2011), Janome Platinum Plus which is working and I recently purchased a Viking Sophia for $50, strictly a plain machine no whistles and bells. I will not purchase any more. The Janome I use for quilting classes and the Sophia I may give to someone.