Thanks for photo, Naj. Water does drain, and though I didn't measure output, looks like it was working ok, which still leaves me looking for water ingress. Since there is no water in front of the cross member where front seat brackets rest, I took out parcel shelf; small damp patch in corner of that section, so will see if I can get water to migrate from there to footwell (I can't see how, but you never know) and will then trace back.