After contemplating returning and finding another solution, I tried one thing with my new door opener, and it worked! I had tried connecting 3 times and it went all the way through the 4 tries and 15 minutes and then errored out. So I got a ladder, started the process again, and every time the garage learn lights went back to green indicating it had left learn mode, I pushed it again. It went all the way through pass 1, all the way through pass 2, giving me plenty of time to think about how ridiculous it is that MyQ works with my 20 year old garage door opener but won't work with my 1 year old opener. But then, on the 3rd pass, the door opened and the app said "Success!" All is working as it should now with a door that is supposedly not supported. Too early to know reliability yet, but it's worked all morning sending alerts and opening and closing from the app. I love a hack. It will be interesting to see if this becomes part of Chamberlain's instructions.