Problem solved! Friday, the sales rep called and said that the requested Equal-i-zer 1400 was in and when did we want to come in and get it put on?
Towed the GD to dealer this morning - same results as last week - front end of TV felt light, minor bumps in the road felt too strong and sway could be felt from time to time.
Took a service tech about 45 minutes to swap the E2 for the 1400 Equal-i-zer. Different tech than last week - he appeared to know quite a bit about what he was doing. We measured the truck height, how much rise was on the back end unloaded, leveled the trailer, and set the hitch height to what the tech though it should be. We ended up with the truck having a slight rise in the back vs perfectly flat, and the trailer having about 1/5 of a bubble lower on the tongue than level. I agreed that it looked good and we headed for home.
I could tell as soon as I hit the street that "something was different". A half mile later, I hit the interstate and let her roll up to about 65. WOW - what a difference. Except for seeing the trailer behind me and feeling the weight, it was like pulling nothing at all! The trailer was well behaved, no sway, no bounce - just smooth sailing. Passing big rigs on the road resulted in a tiny amount of pull - just barely enough to feel and certainly not bothersome. Bottom line is: the Equal-i-zer worked exactly as advertised and the tech who set it up certainly knew his stuff.
So, with all issues solved, the misses is "ready to go camping". I certainly cannot disagree with her. See y'all in the campground. Be safe.