Think sunroof drains are roof lining drop rather than complete removal.
Roof Rails are easy but you'll need a ball ended alan key. All done from the outside. Look at the brackets and rails, you'll notice the inside edge of the rail has a slot and where it joins the bracket there either a slot or a plastic cover covering the slot. the alan key sticks in there. Remove the brackets and you'll see the base plated bolted to the roof. Remove the plate and seal it.
I posted pictures on someone elses post about a year or so ago. If you can't find em and need the photos let me know and I'll dig em out.
Jim
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