Those are great machines,but they are better when you sew what they were designed for.Clothes with regular thin thread.If you want a heavy duty type of home machine get a Singer 15 class they have a type of hook in them that will allow you to use #69 nylon & sew 1/4" or so of leather w/o any problems.The 201 has a rotary hook that is for lightweight only.The 201 is a very smooth & sought after machine here in the states for quilters,it seems like there wasn't as many made as the 15 class.