That's a pretty good looking custom arc reactor. Good job, definitely one of the better ones I have seen.
I went with pure white LEDs cause I felt that they gave a better movie accurate appearance when compared to the blue LEDs. I was going for an arc reactor as close to the mark 2 reactor as possible. I measured the width of each component to make them as close to the real deal as possible. Also with the 5050 LEDs (33) it is supper bright and gives off as much light as the one in the movie.
I like the decorative ring on the outside of yours... what is it/where did you get it?
I can't wait to get mine finished up and show everyone the final result.