I use my Elna quite a bit, among the double layer cams there are some nice stitch patterns and the freearm is very handy some times. Another thing about the Supermatic, it takes top stitch thread as well as lighter weights, and it takes large size needles. These days #19 is the larges good quality needle I can find, but there is a Chinese brand that stil makes up to size #22, it's handy for top stitch thread denselly woven materials. Singer and others had these sizes when cast iron models still were the norm. Not all zigzagger handles top sititch thread and size #18 is usually maximum. The bobbin tension setting screw is numbered, it makes it easier to readjust bobbin tension back to the general sew-all weight.
I'm not sure which type of machine you have now Sewfew, but the odd Supermatic turns up now and then, and these days it's possible to get an aluminium friction wheel, fitted with O-rings. I have it on mine and it works well.
Last edited by Mickey2; 07-16-2018 at 08:45 AM.