Good job thanks for sharing. Will keep at it in investigation. Don't want this floor to start rotting out for damn sure.Driver floor is where mine got wet also. Definately take a look under the cowl. I hope that's it, I probably won't know for quite some time...
I believe I have seen another thread, where they had a leak further down the side of the cowl edge. Same issue, bad caulk job, wet floor.