Yeah, but I was thinking about having that pump sit about 6 inches higher, to straighten up the tube leading to the inlet (to optimize the flow leading to the pump). Otherwise, that's exactly right.
BTW, that bottom portion, sticking out of the case (which is right), only needs a screw in plug, not a valve (if that's what the yellow "X" is). I thought about using a valve, but they're just too big to make something nice.
Otherwise, I really like your idea of having a central manifold, but you'll have to do something about that duct tape job
