I think we're going to have to send you a new one and a new knob (actually, I thought this was already done!) until my dad locates your originals. He put it in a safe place, always the best way to keep it a secret from yourself.
He wasn't happy with the way the pot was modified to work with the original knob. If we do it the same way, you will have the same problem.
If you haven't moved, I'll get replacements to you in tomorrow's mail. Email me if you have a different mailing address.