I have baja flat and gobi ladder. Initial fitting resulted in pretty significant contact. I loosened up the rack and tried to move it fwd but it was maxed out. It then took a fair amount of cutting and grinding with a cut off disk to get clearance. I basically took the top portion of the ladder bracket all the way down to the weld as far as i could w/o compromising the strength. I had a moving blanket catching all the metal sparks. I started working carefully, but to give you an idea how many rounds of metal cutting and trial i had, eventally i was impatient and the blanket eventually was smoldering and started on fire. Even with the protection, and a wash there was a lot of metal particles that stayed on the roof and got rusty. I had to clay the roof and then protect with touchless car pro hydro 2. Which works great when you cant really reach the surface.
Go ahead and buy 1" skateboard tape too. The ladder rungs and top area need it.