here is a update:
i am going to try to make 3d support same are wood style other steel style
and the coaster part is olsow done only thing to do is supports and theming
here are some shots of the elements
a overview
extreme U-turn
the helix
the inversion
i call this the rollback lift the train don't have enough speed to make the hill so you will think you get a rollback but the lift prevent that from happen
the rusty old 3d supports of the hill-lift
as far as the completion of the coaster:
complete track support: 70%
the building structure without the textures: 100%
3d theming : 20%
the coaster track it self: 80% it needs some minor tweaking on segment settings and stuff