I think for now I would add the ramp to the structure instead of the models database. At least it would all work. Yeah, I know, one more thing to go with in the shuttle package.
On another note: i am going to have to build fgdata for each dissection to track the starting of the bugs. Rebuilding fgfs and not fgdata (using next) works enough to run the sim and identified my bugs are still there in both the aircrane and shuttle even in 2018.3.4 fgfs. Thus why I asked if it makes sense it could be fgdata where the bug lies? If I pull 2018.3.4 fgdata and the bug is gone in using both 2018.3.4 fgfs and 2019.1, if it will even work enough to have any kind of integrity, well, then I think that would be telling.
Yes, it looks like the gantry structure is also placed in the wrong. The way I see it, rotate the entirety of the assembled shuttle and gantry models 90 deg clockwise (looking down on it) and you have it correct. Also there is a building sitting on the crawler road.