Quote - Thanks Helgard; I'll lock those up now.  I added targets to the piston and set it up as you described yesterday; Its still a bit wobbly but getting closer.  Is there a way to lock the piston so it can only travel in the Z axis?  Its parented to PistonA which is parented to PistonB.  If I can lock it so it only stays on those rails...

nyguy:  Any ideas on how we can make this stick to the tracks and run across the Viaduct?

Here are the files:

toytrain
http://www.posetteforever.com/dload.php?action=file&file_id=223

rollercoaster
http://www.posetteforever.com/dload.php?action=file&file_id=113

Quote - As for the issue at hand with the rigging. I have been trying to figure this out for a while. I have a rollercoaster model with tracks that I could not rig to follow the tracks. I was hoping with this thread I could finally finish it. I will be watching this thread intensely

Thanks I will look at this some and maybe I will finally be able to finish my coaster.

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