How about a new type of foundation (if it can be called foundation) wich allows you to easily place train tracks along vanilla stone-walls or cliffs and also looks way better than the normal foundations?
The idea would be some kind of freely placable Beam-construction, similar in design to the perdendicular conveyor wall, only for train tracks. I've built a few train tracks along walls (partially because i think it looks pretty cool), and had some frustrations while fiddleling with the regularfoundations, on top of which I then placed the tracks. I mean, it worke, but there might be room for improvement.
Thanks for readin, i guess :)