Scott: You're more into it than I am so I am - and that means more up to date. I am working from memory and experience. Keep in mind that Saint Murphy is the patron saint of sailors. When you are in trouble - there is likely so much going on that you don't have the hands or stamina to effect repairs. And when fixing a pump hose, the pump can't be working, and worse, it is possible that water is coming in through the hose being repaired.

My vents are in the motor lazarette.

One other thought about the electric bilge pump. When, as we have both experienced, there is water above the bilge boards, it is important to get that water out of there ASAP a) to see what might be leaking, b) to make sure the leak is not catastrophic and c) to free your hands so you can fix the leak or do what otherwise has to be done, including manning the second pump. Thus, the battery capacity is irrelevant for the purpose of a "catastrophe" pump. The lower the boat gets in the water the more water it may be shipping.