I was required to install them on riftval. I watch the convoys run right past enemy tanks who ignore them and I keep telling people to fly up to the strat complex where each strat has a train resupplying it. If Hitech asks me, I will install them on my other terrains that were released before the path's function was made operable in the terrain editor. I'm working on a new terrain and will have to install them on it to get it into rotation. Hitech would probably have to ask someone with terrain building experience to retrofit the path system into all the older terrains. I'm busy with fjordma right now.