I am starting to design my MVHR system and will use the radial system. I am finding some of the components quite pricey ( manifolds) I know they have o rings and clips but I do wonder if these can be home made?. Jeremy made his own silencers and I wonder how difficult a manifold could be. I also like being able to adjust the flow at the manifold rather than at the terminal to keep noise to a minimum at the terminal. Can anyone point me at other suppliers that are reasonably priced? Any other inf