"I haven't yet used the knee presser foot lift, because those knee pedals on machines I have owned or used, have always been substitutes for the foot feed, not to lift the presser foot. My poor confused knee would end up mixing me up."
I have to laugh at that because I know what you mean. My mother always has used the knee pedal to power her Singer. Of course, it was one of the first machines I learned on. I didn't sew on it but a few years yet that was imprinted in my brain. I now have machine with a knee lift. I often forget it is there but am getting better about knowing how to use it.