Some of your bends could use some cleaning up. The mobo to cpu line could benefit from a couple 90 degree fittings. On your long runs, try keeping them on the same vertical plane until you're ready to land it, and take a level to each one. Try sticking to 2 to 3 90 degree bends per run. The more little offsets you add to try and micro-adjust, the sloppier it looks. I run electrical conduit for a living sometimes, and there is a definite art form to bending good pipe. It takes time, practice, and a lot of wasted materials to get good, but it's worth it. Looks great though. Makes me wish I put a little more time into mine.