Hi,
Thanks for the query. Unfortunately I cannot see a way to easily recreate that type of rig in RailClone as it would involve being able to adjust the sub objects of the source geometry from inside RailClone. As an alternative, if the curve pattern repeats it might be possible to create a series of pre curved planks (in my example, attached, I used a skin modifier to maintain parametric control) then simply add them as a segments to RailClone.
Hope that helps,
Thanks,
Paul