Thanks for sharing your "SMAD" problem. I was bitten by the bug, but my husband saw what I did in refurbishing an antique machine, and he was bitten hard by the bug, too. I can't count how many machines I have now. I just fixed one to sell, but it's such a work of art, I'm not sure I can part with it. Even my daughter, who has no interest in sewing machines saw it and asked, "you aren't going to actually sell that, are you?" We are in danger of needing to build an addition to our home to house the museum!
I don't often need the bells and whistles of modern machines. The old mechanical machines will still be sewing in 200 years with a few drops of oil.