Again...rookie question, but I'm assuming a knee lever can be added to a foot pedal operated machine? I bought a 66-18 and the cord of the foot pedal is crazy short - I had to drop it straight down through the leaves of my table and it barely reached. Would much prefer a knee lever. I guess I'd have to put it in a cabinet or a base with a hole for the lever.
And I seriously can't believe someone would want to have a pedal/lever activated with knee press! I suppose if someone had hip issues and couldn't externally rotate their hip, then another option might be needed - but for the general public, that's a design fail. I'd have to seriously evaluate how badly I needed something sewn!