Nice work, your cab has a lot of potential. I have to agree with the others here about the 400w hid in this small space....it's gonna be a real challenge for you to manage temps. Now, I've seen some amazing things here on riu so I realize almost anything's possible, but imo you'd have a much better chance of success with a smaller lamp. I'll keep an eye on this thread and hope for your success, it's certainly an ambitious project, and with a few modifications it could be a slick setup.