Are the tanks in this mod meant to target rails and elevated rail supports? This seems really annoying and makes setting up outposts hard to maintain unless you are on the planet, short of either encircling the whole thing in your main wall (difficult due to oil ocean generation) or walling in and turreting the entire distance of the rail (annoying). If this intended behavior, can there be an option to turn it off?

That's an interesting question/suggestion. I am getting back into the mod a bit for 2.1 and I will take a look at this. Personally I have only used belts on the planet, and haven't had that issue.

I ended up just installing the mod that makes rails and power poles invulnerable as something of a stopgap.

Since I'm getting back into the code, I did review this. The tank behavior is cloned from a "medium spitter" entity, so it should be doing whatever a medium spitter would do. This might be influenced by pollution, not sure? Sorry this has been an inconvenience - again, never came up in my personal games because I've just used belts, which can be targeted but in practice don't seem to be a priority.

This is the kind of fix I'd like to make, but I don't know how feasible this is without impacting other things/a big re-write.