I have persevered and am managing to make something of the new version of Rolling Thunder. This is the version without the building. It should be a much smaller file.
The underground bit is still the same. I removed the building from around the two above ground coasters, but wasn't able to provide supports for all of the tracks and I wanted to do that is I didn't like it with tracks floating in the sky.
In the end I rearranged one small section of track and added two smaller, mostly open, buildings to accommodate the many levels of track stacked on various levels.
It isn't finished yet - but this is a WIP picture.
http://s5.postimg.cc/44k8ey58n/RC_RTN_001.jpg
I'll try to get back to it on the weekend some time.
I'm totally over building roller coasters :D
