elsewhere I have posted out replacing spring on my 2003 Scout, which we bought used in February 2019. Its factory unloaded weight is 895 Lbs per the placard. So, we do take it off road for BLM campgrounds and boondocking. We try to not jounce it egregiously. The springs have flattened for the 2nd time since the trailer came off the showroom floor. My sense is that I prefer to use the same springs and replace them as needed in kind. I don’t want to put in stiffer springs and shake the Aliner into it constituent components. The spring hangers are about 20” apart, so there are no options for a softer spring that still has 1,000 Lb rating. BTW, the online spring outlets for these small leaf springs do not list spring constants (stiffness). That is all I have to say at this time.