need help identifying zippy

I've been kicking around the idea of combining my tanks into a large one
(around the 180-220 gal range) but before I do that I want to make sure that
they wont kill each other. I've gotten most of my fish identified but one
has thown me. I picked it up from the lfs a couple of months ago (he was
sick and they was going to freeze him). I nursed him back to health and he
is doing great. In fact he is doing so good he kicked the crap out of my
sunshine to the point that the sunshine is in the hospital tank regaining
his strength...and his fins. I origanally thought he was from the
melanochromis family because of his shape; however, after checking around i
think he is closer to a metriaclima. He is a very bright blue with virtical
black stripes, except on his face where they are horizontal. All his fins
are black but lined with a light blue on the outside edges.

I will post a pic if someone would educate me on posting pics.

P.S. He is only about 2 and half inches and he is starting to rule the
tank. He is now bulling my marmalade peacock. Even the big ruby wont mess
with that little sucker.

Thanks for any info

Rich