Giles -
No WDH/sway control with our small/light properly loaded/balanced 1575. Just the coupler on the ball.
I did not have to change the ball height.
The StableLoads when installed correctly keep the rear end at about the same height when there is nothing hitched up.
You are ALWAYS welcome to stop by and see my setup in person.
If you have any questions fire away.
Does your truck already have the silly factory circular stops installed? If so, you won't need to drill anything which is a huge win.
Here are 2 of the 4 stops that came with my truck -