right, the sway and panhard are not shown in that pic only because that pic is from 5 years ago and I just put those on last month. I chose that pic anyway because it was the best picture to show the suspension.
The sway bar wasn't from a kit, I had to make it custom. I did not actually check it was completely neutral with me in the cab, 99% of the time I am single handed so that stuff is tough, or if I'm really in a pinch I ask my wife for help and listen to her complain the whole time. It was definitely neutral with nobody in the cab because I checked that.
but yes, in the video from the rear perspective you can see smoke come up right away with only a few revolutions of tire spin. I did re-locate the fuel tank behind the rear axle so there is at least a little more weight back there, but it is still light.
I do think the video does show that the axle is very stable, and from inside it feels like the trans is going to launch to the moon.