My installer showed up a couple of weeks ago and replaced all of the Weathermatic valves with Hunter valves. I had time to cycle it 2 or 3 times and it worked great. I guess the real test will be next summer.
I had sent him a "to the point" letter and attached a print of the threads from this forum. He showed it to his supplier and got "about $300.00 worth of free stuff", (I guess including my new valves).
"Thank you" to this forum and the nice people in it.