Similar to rmkrum example:
We have 25FT SS Rear bed 5300 dry 6300 wet. 2014 GMC 1500
5.2 4x4 short bed. 1488 cargo 9600 tow cap. EZE-Lift WD hitched using 2-1/2 links loose (used a through bolt/nut for the 1/2 cause 3 links too tough to yank in place. With 10 gal fresh water, 800 mile trip up and back to Sequoia Natnl Forest. Lot of pulls and decends.
Sweet ride all the way up on many road surfaces good to bad. Totally tight, balanced with NO porpoising. Never better feel. We've had it before but rocking gone on this trip.
On way back same exact loading but could only do 1-1/2 loose links due to uneven ground while hitching up.
BIG, BIG difference that 1 loose link made! Much more consistent porpoising, and bounce on the same roads back. Felt like a completely different set up and hitch.
Note to Self: Keep the 2-1/2 loose links set at all times !!!
Relaxing is hard work
2005 25ft International CCD SS
2014 GMC Sierra Denali 1500 4X4 int. 3.43 Int sway/tow controller
1981 Honda Trail CT110 1X0..no sway control