When I first got my newest machine, which has the knee lever, I was extremely frustrated- just could get the coordination and was lifting the presser foot when I meant to use the foot pedal. Then the gal at my LQS who sold me the machine gave me a great idea- use the knee press with the right leg and use the foot pedal with your left! Works great! Now I LOVE my knee lever and really miss it when I use my other machine that doesn't have one.