That type of LED can put off some serious heat. What brand is it?
With built in LEDs, its an impressive piece.
Here's mine: http://www.therpf.com/f11/rc-star-destroyer-fiber-optics-167398/
I love your idea with structure mounts on the sides with the plugs. It will look sweet when its mounted and done. I too am trying to figure out how I will trim the fibers in the little recesses and trenches on mine also. Anyone have any ideas?