@RMi_wood
You were right, working on a very bad base is very difficult, I mean, it is not difficult, BUT you have to choose very well the task that you are going to do FIRST.
I have made a mistake that I can no longer fix this height of the work, surely a rookie mistake, the point is that now I will not be able to work the elevation of the terrain after having put all those elements, the work of the elevation of the terrain should have been the first thing to do.
Now I can't do that, because if I want to get closer to reality in some areas, I have to go down a lot and go up a lot all the terrain in the area, which makes me have to readjust the whole track ... and the elements, impossible.
I am going to finish this version but when I finish it, I am going to make another from scratch with rtb and the correct elevations, I will use this as a template to guide me where I have to put the elements.