When I get that way I watch a couple of the car shows on Velocity and get the bug again. I also like to have a project sitting around that I really love and do a little something to it when I start to drift.
It could be a strength issue. I'm not a metallurgist so I'm just guessing. Casting might add some strength that's not there for billet because I see the centers are cast but everything else is billet. If you cut a billet center, i don't think anyone would know the difference if its polished.
Yes, really nice. Attention to detail is top notch. The bodywork is seamless, and the paint is awesome. Even the application of the carbon fiber decals is perfect. I know how much work went into this, and I applaud you!