IMHO. JMHO.
All the aftermarket items are just a patch.
Correct tires
Proper inflation
Shocks and springs
Always amazes me if you buy a used RV it's given to put new shocks on the front but nobody ever replaces the leaf springs. :R
Leaf springs are metal and metal fatigues.
I learned this with my first USED MH. Instead of wasting my money on after market add on's, that if they were needed they would have been standard on all MH's from the factory.
I went to a truck frame shop and they SHOWED be the fatigue factor. If you can't afford a whole new set of leafs have an additional one added to offset. These are nothing more than a truck and should be maintained as such regarding the chassie.
All the C's I have owed new and used have driven and handled just fine. The A'? Everyone I have driven were all over the place given any slight wind or passing semi's. I got tired just driving them down the interstate!