i don't know about you guys but i think the reason they moved from the central inlet is quite simple; the central inlet is a pain in the ass. i understand all the benefits of it, but i CAN'T be the only one who has had SERIOUS TROUBLE getting hose clamps to work on the ole maze3. i mean i use 1/2" id with the thicker walls, and there is literally no room between them for a proper install of hose clamps. at least with them spaced farther apart you can keep your system from leaking(

) which is a Real Good Thing.