Looks interesting, especially with the inclusion of an inversion on a giga. One thing I would point out while looking at your first few screens is to maybe look at a few more pictures of Intamin style support work to make yours a bit more realistic. It's great to see you putting custom supports on, but don't overdo the lattice, and don't connect the lattice directly to the track braces. This is the first picture I found which illustrates what I'm talking about:
http://rcdb.com/ig594.htm?picture=18 . See how the tube under the rail has the single, short, vertical tube that holds up the actual track? Something like that would just look/work nicer. Other than that, I'd say you're off to a good start!
edit: well, I'm not one to be talking about colors, but often these sorts of rides look nice when you combine a steel-like color with a sort of dark hue, such as a blue or maroon or forest green. Maybe try something along those lines?