Sorry I didnt get a hold of you today Dale, something came up and I had to go into work. I am however off the next two days so I will be available pretty much whenever.
As for angles, two of them can be at perfect 90's, the other can be just very slightly angled down. I havent permanently placed any corals so I can move things around based on what the flow looks like, as opposed to changing the flow to fit where things are currently placed.