How difficult do you think it will it be to remove the modular roof pieces with the roof rails & crossbars installed? How much of the roof can be removed with the rails still in place?
I have both. It's do-able, but the tolerances are very tight. The retainer on bumps against the frame of the door, and you have to wiggle it past the brackets.
I took the rails off for the time being as I don't have any top loads to carry.