I haven't done any modding for a long time. Last time I remember using any mods, we didn't have launcher to choose Minecraft profiles, and you had to manually edit the jar file with Winrar.
Anyway, I used to use a group of mods, and one of them was a mod with several parts to it that were each enabled and disabled with a config file.
It had a gates mod, a bridges mod, and a rails mod in it.
I wanted to use this mod again, but I can't for the life of me remember what it was called, so I can't even find if it still exists, let alone find it to download.
I don't know if that's enough info to help somebody know what mod I'm talking about, but hopefully somebody can help me?
I don't recognize from your description, but this website and Curse are the best places to search and find mods.
"We live on a placid island of ignorance in the midst of black seas of infinity, and it was not meant that we should voyage far."