Did anybody catch any mention of what they sealed the bottles to the roof with? Seems like silicone adhesive caulk would work, but was that what they were actually using?
Don't think it says, but yeah that seems simple enough. I guess they have
a little weight to them, but a good seal should hold it up for years.
Maybe it would be simpler to place them up there empty, then fill them once
they are locked into place.