Those of you who have aftermarket mud flaps on your trucks how did you mount them. I like the ones which are mounted to the rear bumper rather than on the rear of the rear wheel wells but i don't like the ones that are attached to a receiver hitch. i don't know if i should run a chain across the underside of the bumper or a piece of angle iron. there is two holes drilled on either side of the bumper but im curious as to how it was rigged up. i figure you guys could give me some insight.