Fred, I just bought a knock-off of the grey Singer in Barra's picture....nice shop BTW Barra!!......the problem you were describing is one common to just about any sewing machine. Sounds like you worked it out and that's good...but my point is that if you ever get stuck with a problem it's usually something simple and even Aunt Mable across the lane who has been making curtains and clothes for the children for about 80 years can probably work it out for ya. So don't be afraid to ask most anybody who knows how to operate a machine.
My brother is a tailor, as my Dad was....I wanted nothing to do with it, but I was around machines all my life, which means nothing here, cept my brother can't wait to get over here to play with my new toy. Every now and then he comes across a project where he needs a machine like mine.
I'm having a problem when I go from one layer of cow and suede, to two layers of cow and suede on the same project, in this case, a knife sheath. The stitch is different from one to the other and my bro is gonna show me how to fix that....I hope.