How many of you pull a 5er with a standard bed?

I have two sets of bed rails. One 3" in front of the axle. One puts the pin 12" behind the axle to give 52" clearance to the cab. With our light weight 5th wheel, we use the back set of rails. I don't recommend this as it goes against manufacturers loading recommendations. But it works for us with our 6'9" bed.