Somewhat of a weird question. I basically have new shocks and struts and rear air bag helpers on my 2008 LC, this was done last year. We recently bought a travel trailer. It pulls great and does not sag with the help of the air bag helpers and Weight distribution hitch. I am just thinking down the road, to assist with wear and tear, can I replace just the rear coils to a slightly heavier coil instead of changing out the entire suspension? My wife doesn't want it any higher than it is right now so I am just trying to figure out some options.