as nervous as i was to drill into the roof, pros and cons had to be weighed. fact of the matter is that in order to get the cleanest look it made sense. the value of the vehicle is not going to plummet by drilling a single hole, and with Hellbent doing the work I knew it would work out fine. The water tightness is amazing, been thru a full weeks of storms and not a single drop is getting thru.