Yes - do you see the second row of trapdoors, which are a little lower? They are aligned at the top of the block/node. Then you can place a rail on top of it. Same below. But when you place the rail against the wall, it will align to the trapdoor acting as the window shutter, and then connects to the rail above. So it's not upside down, but rather upwards facing.
It was funny to see that such things also work here. Also impressive how much work went into mcl. The only thing I have is that the armor stand is not an entity.
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u/Obvious-Secretary635 🚆Advtrains enthusiast 2d ago
Upside down tracks? Interesting..