Hello, we just got a 2015 Bighorn 3570RS. Shake down trip went well, except our 2013 F-250 Diesel sits a little low in the back and the 16K super-glide hitch we have, lost the top plastic plate (spacer/shim). It cracked and 1/3 of it came completely out. I was told I could get by with the truck for a couple years with some air bags and maybe add a leaf. What do you think and any advice on the hitch...repair...replace??? Thanks, Jerry T.