well, today I removed the wiper assembly and cleaned out the scuttle drain area of leaves and muck. the area was very wet, but the drains seemed ok. I have not had any more water into the car since my last post, but it seemed a good idea to clean anyway. if you do this, then get a new pollen filter to replace while you have easy access. I think I shall leave the floor insulation out of the car until I am happy that no more water is coming in.