I've had a busy weekend at work and had no idea what discussion have I sparked. Though you people have surely answered my question: it is not a good idea to learn modding with that. That's disappointing, a I'd be very happy to have this feature.

Ok, after like 12 hundred hours in Factorio I've created an account to post here, after finding the thread in reddit. I like the idea and I seem to not be the only one. Could someone more experienced in modding suggest how difficult would that be to make? A) arrows? B) would dashed lines after chain...