Sorry I didnt get your message until now. I have been out of the hobby for a while.
As for the Eclipse12. There are a lot of online resources to mod your tank to be exactly what you want.
First the lighting.
The stock lighting on the tank is horrible. Ahsupply has a kit that fits perfectly in the hood Here You can adhere the lights as you see fit. I used a series of plastic supports for the bulbs and just screwed the ballasts into the back of the hood.
For filtration I used a rotary tool and after removing the stock filtration carved a notch for HOB filter. This is the one I used
This is all I can think of right off the top of my head but if you have any problems I am back to help in any way I can.