For those who are still interested... This is what I was seeing in my head, with the exception of an actual ground and the city being the surrounding structures.

http://www.irrgheist.com/hcrafttrailers.htm
[youtube=425,350]eRfokWUKj4Q[/youtube]

The demo is, well, unique. I imagine the game would actually be fun to play, if it wasn't so easy to fly off the edge. (Good example of unfair AI, who seems to have super-track control.)

Also shows something similar to what I was talking about with the round-force-field. Fill-in track items, like lights and rails. Plus, the track-turn and width limitations. (They could have used larger turns, since the controls are so touchy.)

Yes, I am still playing with my sandbox. I am up to version 4 now, and slowly working-in ghetto collision detection. Which I am throwing into my generic MODULE that I am attempting to create. I seem to be getting faster processing with the code being in an external DLL, than I would if I were to attempt to do it all in TB, with all of the other things going-on in the loop-code.