I'm planning on fabricating up bumpers for myself and possibly making a jig so I can make a couple extra sets to sell. My question has to do with weight. How much weight do you allow for your bumpers? The ones I'm designing are going to be heavy duty ladder style made out of 2"x2" square tubing with 2 shackle mounts and a hitch receiver. I also plan on making a tire carrier for the rear bumper. My worry is my design will be too heavy so I need opinions on what max weight I should shoot for for front bumper and the rear with tire carrier.