Made a little more progress today on the WD hitch. I took it apart and added another washer to start at the six washers recommended as stated in the manual. I had to go out and pick up a torque wrench capable of 250 ft-lbs. When I reassembled the head/shank I found that 250 ft-lbs of torque is enough to flatten those conical washers as well as make you think you're twisting the bolt in half. Those washers weren't even close to flat when I took it apart and the head actually jiggled around on the shank...turns out that this is not normal! The angle set bolt needs to be tightened twice; once unhitched and again when it's hitched, as the weight of the trailer actually moves the head enough to where the angle set bolt comes out of contact with the shank...so it has to be tightened again. I also made some "unofficial" measurements (due to the uneven ground it's currently sitting on). If the measurements hold up once I get it on even ground, then this means the dealer set my hitch head 1" lower than the trailer tongue. I really hope this isn't the case because I will lose all faith in my dealership at this point.
Anyway, I learned a lot in this process so far and now I have a better understanding of the WD hitch...and I got some new tools out of it.