I have an older Bernina and was frustrated with the knee lift until I prevented everything from scootching around while I sewed. I put the rubberized mesh shelf liner on the bottom of my foot pedal and the bottom of my machine. I positioned my machine a fraction closer to the front edge of the table so the knee lift wouldn't fall out. Table height is important, too so you don't have to lift your leg to press the knee lift bar. Then it's just a matter of training your brain and muscles to make the correct motion. I don't like to sew without it now, for either garment sewing or quilting.