I have some suggestion but I dont know if i thinking correct:)
It could be nice feature in RailClone:
UVW Mapping operator.
I think it could work like this:
1.if i use RC in scale mode I have sth like on screen01.jpg. Default element has distort UVW (screen02.jpg). So if i could use UVW mapping tool and assing numeric value for elements with same UVW (screen03.jpg) i could have clean straight UVW (screen04.jpg)
Same story with wire ID but in my opinion is not so importnant.
I hope i explained it:)