Tow it for a while as is. Weights are right, front axle is right. See how the sway is from wind gusts, 18 wheelers, straight box trucks.
The dealer installed a too small E4, so I bought a larger E4 head and bars. Works better. Currently my bars angle up one bolt hole to the trailer. Flat, the sway is more noticeable. The sway is minimal with one hole up as I posted in your Hensley thread. I would definitely prefer the Hensley, but, will keep the E4.
A number of people have recommended “flat” bars to me. I have 1 less than the max number of washers, bars still slope up. I do recommend the E4 jackets that go on the L brackets. https://www.amazon.com/Equal-i-zer-9...7455223&sr=8-1
I cannot take a photo of my set up as I am 700 miles away for another week.
The other thing I did was to “stone” the upper and lower area of the head and bar sockets. There was weld spatter, rough surfaces, and a bunch of paint that became sticky when grease was applied (the only area E4 wants grease). Also, the head was slightly warped from welding. Smoothed it out, added grease, and most importantly, keep these two bolts torqued per E4 specs. I do loosen these 2 bolts when greasing, sometimes even remove the sockets for cleaning. There are a couple of dimples on the casting portion of the socket area, that I assure has plenty of grease. The E4 singing when turning lets me know when to grease. The jackets reduce some of the song. These two photos are before stoning.