Ah, right. so, the rocking motion of the boat works the system? Sounds good. Don't think I have ever come across boats with that system. Is there anything visible above floor level, or is the whole thing hidden from view? What if a foot of rain falls during the night?
The Coulams have hand pump mechanisms installed, which work fine until the rubber bellows perish in the sun... then not so well. Also, never drop one of the wee plastic terminal covers from a leisure battery into the bilges, as it is a perfect fit for being sucked inside the hose and bunging the thing solid.
I think the Pioneer self bailing only works when you are moving forward? That was the impression I got in the two I've been out it. They are so stable there isn't any rocking motion even when standing up trying to cast thirty yards
I hated the Coulam hand pump, the ruddy handle always seemed to be in the way waiting to catch my line.