Once it is set, it should be good. Why would it change every time you hook to travel, same truck, same 5th wheel?
Check the level with a good bubble level on the truck and then the bottom of the 5th wheel.
When we had the MorRyde IS system installed, they measured from the top down to get height, then in 3 spots from the bottom of the frame to the ground to make sure all 3 measurements are the same.
2018 Road Warrior 427/2016 golf cart (gas) sold
2013 Can Am Spyder RT Limited
2017 Ram 3500 w/Aisin w/4:10
2 Dachshunds DJ (RIP 9-12-19) & Joey (RIP 5-14-21)