A photo is worth a thousand words! I need a photo or two of how these: 1. The arm connects to the motor shaft. 2. How the blade attaches to the arm. (Trico arm and blade for a 30 roadster. Thanks!!
In my opinion, both the wiper motors, blades, and arms are for decoration only. As a pilot, a person gets used to rain on the windshield. Even with a points car, do you really have to prove that it is in proper working order ?