I have only a passing familiarity with Sofia lathes, in that a company I used to work for had one. Can you post a photo of the headstock panel? I believe they have offered several different layouts/configurations, so a photo of the machine in question should help. I seem to recall the one I ran a few times was terribly confusing until I finally figured out which lever did what in relationship to which chart, and none of that was obvious or intuitive!