Duane Car Phone Holder adapter to HR / RICHTER / 4 Quick FIX / 4QF

A lot of mobile phone holders are two-part - the car mount specific to your car, and the phone holder specific to your phone. The two parts can be mix-and-matched. They connect through the 4-claw “4 Quick FIX” system defined by the (unfortunately now defunct) company “Herbert Richter Metallwaren-Apparatebau GmbH & Co. KG”. If you have such a car mount (sometimes called “HR” or “4QF”), and you want to use the Car Phone Holder that was designed by user Duane, this is what you need to print as the backplate.