As for the pinching door lock knobs, you could always just replace them with some of these old school knobs:
https://www.amazon.com/1968-1977-Inner-Knobs-Ribbed-Chrome/dp/B01MU6U2GQ
https://www.amazon.com/1968-1977-Inner-Knobs-Ribbed-Chrome/dp/B01MU6U2GQ