Tom/Seth, maybe what I’m about to say is exactly what you’re already saying and I’m just misunderstanding, so apologies in advance if that’s the case. .
We know the bottom of the dagobah and the ranch are a match per Gino. And though Gino isn’t sure, i think he said it seems less likely the top is different.
Isn’t the most simple explanation then that the ending Dagobah Saber was left intact after filming, they grabbed it for ROTJ and after it was rejected, it ultimately became what we now call the ranch saber? And somewhere in between filming Dagobah and showing up on the ROTJ set, the clip broke and was repaired “wrong” in its flipped orientation.
It seems easier to swallow that it’s all the same item with one piece being damaged and fixed- than a full rebuild or even a mishmash of parts.. Again, if this is exactly what you both are already saying, my apologies, I just interpreted it differently.