I don't have a link I'm guessing the link Matt provided from JC should be the one. I've read of people blowing out the drain plugs from both ends using compressors and canned air just use what you have I guess obviously don't have the compressor at 120PSI I also heard of the drain plugs coming undone and needed to be fixed dropping the head liner and pulling the A pillar covers exposes most all the places it runs to. Also had people pull the roof rail screws and reseal those as well so there are lots of places for water to get in. The secondary door sill is a TSB so check that too. With the front end rake on the stock setup you can be leaking in the back and it ends up pooling in the front floor boards but that's not as common as the other fixes.