Tazz,
I just got my vented loops and I am thinking not to go through the trouble of even installing them and just sending them back.
I thought that these things were a sure thing.
What kind of scoops do you have? Why would it matter? I thought it would take a huge amount of pressure to overcome these things.
Were these things actually tested before being endosed by the seller?
Although not as extensive as your setup, I too plumbed for direct filling and by reading your posts it is looking more and more like the home depot valves are going back in, They may be slow but they have been proven to work.