Thanks Mseepman! Your mod was really helpful and made me finally decide to do this. My fixture is a 48" and my PC's were only 34" so I gained a good amount.
So I got 2 of these ballasts and 8 eight end caps from Nedco.$131
These are the ballasts I removed. I found burned marrett and replaced them as well with better ones.
I thought I could slip these ballasts over the reflector for the MH but they are a little too fat. So I screwed them on to the back of the fixture and they are only visible from the back of the tank anyways.
I just removed the clips for the PC's and screwed the capends to the reflector.
Here they are on.
Here's my tank with only the 4 54w T5's turned on. I got the cheap Coralife Actinic bulbs from J&L for $13.88 each. With shipping it was about $80. I'm sure I could have done it for cheaper yet so I'm happy for $210
