Do you have any experience with running those bolts you quoted earlier in this thread ? I looked into purchasing them and found nothing but negative reviews saying they do nothing. And I already bought a fender roller. It was the same price as having someone in my area do it for me. Any tips and tricks on rolling the fenders ? Other than heating the surface prior to rolling.
For the fender rolling, get it nice and warm (not too hot to burn the paint) and go slow. Stop to make sure the roll/pull is coming out evenly once and a while during the process. Make sure to thoroughly clean out the inside of the fender lip area where you'll be rolling it flat and fill it with some grease/rust proofing beforehand to ensure they don't rust out from making contact/cracking paint on the inside.
I personally haven't used these particular bolts, but I have friends who have and they've been fine with them. They definitely do make a difference if they're set up/installed properly.