nice looking manifold L
Sometimes rookie eyes see what an experienced grower might miss, so with that disclaimer i will add my 2 cents. First I am thinking that the water will distribute to each outlet unevenly because all the hoses are open and water will travel the path of least resistance. So I would think to add some type of valve to each hose end they are easy to find and cheap if that is just standard irrigation tubing you are using. The second thing I noticed is that the tubes end right at the stem of the plant, in my regular vegetable gardening that is usually a no no as it can cause rot at the plant base, I usually put all my drippers at least 2" away from the stem. Don't mind me if this is nonsense to you.
One more thing. Why not use Blumats?
I was gonna ask about the male you had showed in the cup ....sorry to here bout it ,it's still good genetics