I'm doing a whole house PEX replacement and have been researching different systems (manifold, trunk/branch, hybrids) and settled on Uponor's logic system which is essentially a combination of trunk/branch with remote manifolds for zones. I'm looking at using Uponor's EP manifolds and was wondering if it's worth the effort to add shut off valves to each output? All the literature and pictures I find for implementations of this system just show the connections without any valves but I figured I would ask now before I start re-plumbing everything.