I have lately been casually looking at my leaf springs after hearing so many people complain about the sagging. I am curious what method people have been using to verify whether there springs were in fact sagging. Is there a known measurement from the shackle to the ground for certain X configs? Or is everyone just much better at remembering how the X looked when first purchased? I have towed my boat for two summers now (~4000lbs) so based on everyone's experience it seems like mine must be affected, but I'm not sure. Any ideas/suggestions?
Thanks