Extreme trailer sway leads to crash - GIF

[Tooler2]

What parameters did you use? I can see that the hitch higher than baseline (baseline being no trailer attached) would indicate that the load is too far behind the trailer axle; hitch way lower than baseline, the load is too far forward. Is there a spot where it is just right, or did you do a trial and error and use the height as an arbitrary increment?

I load till I see tow vehicle go down a bit.