Now that I have thought about it more, I'm counting the rubrail out. Reson being, from the looks of the picture, the rubrail is not under water, so it isn't a constant leak. Water that would leak past it while floating, bouncing around, whatever, should be handled by the pumps with no problem.
45 minutes of pumping and he went to bed.???Jesus christ man! Does the elevator not go all the way to the top?