I just went through this this weekend. I ended up with around 40 fittings, and i'm manifolding them off the tank.
I had to use some extra fittings and stuff because the big rig shop didn't have every "optimal" fitting but it all fits together, i'll take a picture of my tank when its done, have to go get 4 more fittings because i used a plain tee instead of a street t so i have to run a nipple between the two. oh well. They're 5 mins away, i'll get a pic up later today.
I would like to see some real #'s as to how much faster the bags fill with valves near the bag, not trying to dispute anyone just want to know, i'm also running 200 psi in the tank, that should push the air faster. I better get to work though...
Go here...
http://www.bagginit.com/TechnicalInfo#fittings
scroll down to the FITTINGS DIAGRAMS, thats how i set up my valves. I just added to the "tee" for gauges.