Hatch,
What size net pots are you using? 2" or 3"?
Is 3" big enough for the mothers. I have to go to Lowes today to see if I can find a 3/4" X fitting for the system. I had to modify it a little because They did not carry the X fittings where I went, but I still need at least 1 for right in the middle.
I'll see if I can get a pic to show you what I have so far.
One other question while I think of it. Does the chamber where the roots hang need to be completely dark? I got a gray bin and I think it will allow light at the roots.