Although the fix I made on the wiper arm looked to be OK, I decided that getting a new one would be better. Got the part number from Entegra (0246790), ordered it locally, and installed it. Did torque it down to the specified 65 ft. lbs.
This coach only has one cargo tray, and I was used to having two. Since we are in Elkhart, and MorRyde (cargo tray manufacturer) is here, this as an excellent time to get an extra one. Drove over to the MorRyde facilities and they installed one. Now all I have to do is re-organize for the additional pullout tray.