I have an add-a-leaf theory: If I throw some beefy add-a-leafs into my spring pack on my Medium Duty Springs, obviously payload capacity will increase. However, as flex mid pack is limited in these new springs due to the add-a-leaf, won’t I then cause stress on the Main Spring and Cause Premature Failure? I drive thousands of miles of crappy dirt roads a year. Very little in the way of “Trails”, just corrugated nightmares. Perhaps forking out the $$$ for a true Heavy Duty Spring is the only real way to go. Thanks for your thoughts.