Well, we tried out our new car seat - seems like a success for now. He screamed on and off until we got to the store. The wife went in and I just sat in the car with him. At that point in time he went into his non-stop scream mode. I ignored it for about five minutes and then decided to give it back to him. I started barking and whining at him. At first he stopped and looked at me. When he started up again - I started up again. Well, something changed at that moment - he acted like he was really getting pissed with me and seemed to go nuts! I finally decided that a 70 year old man barking at a dog in the middle of a parking lot was not good!

I just turned up the radio and about 10 minutes later he stopped - just sat there looking at me like he was planning on how he was going to teach me a lesson.

He would occasional bark and whine but not as bad.
The wife came out and we to another store. The moment we parked - he went into his non-stop scream mode. I just ignored it and in about 3 minutes - it stopped and sat there and looked confused. I finally felt like I was elevated to the alpha dog - I could see the tide changing.
The wife got back and he barked and whined a little and off to the next store. Same thing - non-stop scream mode for a few minutes and then defeat.
Next stop – get some coffee and head home. Same thing – pulled into the parking lot and he went into his non-stop scream mode for a few minutes.
I can see some light at the end of the tunnel but have this feeling he is just setting me up!
Will let you know what happens tomorrow.
PS - you will notice he is barking and showing his two rows of teeth - vet said he would remove them (baby teeth) when he turned a year old.