The masts are build so that you can use then TAB key to place them right on straights. In curves with superelevation you can place them but need to move them after that a bit sideways to respect the SE. If you have placed that system over a few hundred kilometers, and tons of massive yards and stations, you can build it blindly (but of course needs alot of time anayways).
Lol, I didn't know that TAB trick
Thanks a lot!