If the 206 is a vertical bobbin, then I'd play with it some more. Too bad about the Necchi. I've read that smoke is only old oil being burned off, but I personally would not take the chance. I love my few vintage machines, but I have to admit the old electrics scare me. I have a 1926 White I'm afraid to plug in. The 301's only problem has been the plug at the machine and a wall plug on the Universal acted up last week.