Sumo or Timbren Bump Stops For Towing

Has anyone been running these and if so, how did you like them?
Some are rated at 1,000, 1,500, and 6,000lbs. Some have an air gap of 1/2" and some at 2". The air gap should keep the stock ride feel. But which version have you tried? Do they help on body sway? Do they feel like a rock when the payload meets the bump stop?
Do the smaller spring ratings do much to the ride when a hitch is loaded? Are they a smooth transition when going over bumps, bridges, or etc.?
Give it up and tell your experiences when pulling a trailer front or rear applications.

Note: I know they say do not go over the stock Tow rating. This is just a question as to how they affect the ride.

Thanks!

I had an 85 w250 that the PO added Timbren to. Not sure of the rating.

Rode very rough empty or loaded. Hated it.

My 92 d250 with a higher gvw rides much better.

I'm not a big fan of just beefing up the rear for towing, you're much better off getting the tongue weight right and using a weight distribution hitch. You get a better ride and Gain stability. Plus you can swap the hitch to a different vehicle easily.

I do run a WD hitch. I found the Timbren units are 6,000lbs which seem to be the highest rated units.
Thanks

Timbrens on all my trucks.