I'm sorry all, Jimmy is right, the holidays were very busy, but I have made quite a few additions and changes over the past few months. I'll try to post a proper update soon.
To connect the two fixtures, I used powder coated steel plates that I ordered from amazon. it's worked perfectly, and basically makes it into 1 72" fixture. I love the lights. I had some issues with a rusted magnet that caused some big problems and i lost a lot of color in my corals, but once I resolved that, things are really looking good now, and I can see more and more color coming back every day. I love the Radion T5 combo.