Vince,
No to burst your bubble, the yellow tang should have been the last fish added. It will be aggresive to any new fish that you add. I know, I have one an he is very beligerant towards any other fish I put in there.
My 75g has:
1 - 3" yellow tang
1- flame angel
3 - Green Chromis
1 - Banggai cardinal
2 - (mated) False percula
2 - scissortail gobies
1 - Yellow head sleeper goby
Crabs, Shrimps, snails
I added the Flame Angel after the tang. The tang harrassed the heck out of it for the first couple of days.
Months later I tried to add a Copperbanded Butterfly fish - didn't last, I had to take the Butterfly out - the tang never did except it. It's now in my reef tank.
Just doesn't like similar shape/colored fish.
Just expect trouble, is all I'm advising.