My trail rig is almost complete and now I am looking at the little details. When I set up the rear suspension I put the shackles straight up and down | instead of like this / figuring that after I put the fuel cell, tool box, tools, etc it would weigh the rear end down and cause the springs to sag. That is not the case. I have about 300 pounds of weight on the rear end and the shackles are still straight up and down. I have no bed on the truck either. The rear suspension is an echobit flip with 2" lift 52" tuff country springs. My concern is with traction and flex. With only 300 pounds of weight and a 12 gallon fuel cell will this give me enough traction. Should I move the rear hangers and get the shackles to kick back more or will the springs sag after time.