MIchele, YOu are not seeing things. You are right. MC will also just clamp directly to the pump for the inlet (depending on model and year). They also came up with the distriubot modules that take a 3" hose that feeds to multipule pumps. If you think about it we have come a long way in ballast over the past few years. Looking back on some of the boats that were original stock ballast boats we see a pretty different idea and style.
Wakedoc, you lost me... Actually college physics was an early morning Friday class and there for i am lost...