[Miami_PT_Fan]

I checked the drain. It may have been partially blocked as it was draining some and then there was a gurgling noise and it started draining at a much faster rate.

The seal looks good. It is still soft with no visible tears. Both the passenger side that leaks and the drivers side which haven't leaked look to be in the same condition.

It has only leaked in heavy rain. But perhaps this was due to a partially blocked drain.

What is the best way to test the seal, turning a hose on it? And how much if any water should get past the seal when hosed? Should it be totally dry or is a small amount of water that the drain can handle to be expected?

Thanks for all the advice so far. It has been very helpful and informative.