Hey Justin,
First off, I LOVE your train mods, they are game changing!!!
Question for you, is there a way to disable making the railcars enterable?
I use the Tab to switch vehicles, as well as the mod Vehicle Explorer to sort my vehicles, and having 100+ railcars being enterable cripples both of those.
U probably figured this out by yourself already but u have to set this to "false" for every railcar, u will still be able to enter them by getting close and pressing "E" but u wont be able to tab to them anymore.