Looks like the "AF" model is readily available now. I installed the "AB" model. Just curious as to if anyone knows if the end result of one is better than the other. I am thinking the "AF" is a little easier to install as it uses different mounting points but how does the end application perform compared to "AB"? Does it feel just as solid? The "AB" seems a little harsh sliding up and down, is this the same on AF? Is tightness to the bumper the same? I would assume nobody has any experience installing and testing both models lol so this post probably could not be answered. No big deal, just curious.