This would also be better for asymmetrical builds, like 2’x8′ stuff, because you could make X the short side, and it should be more rigid than the current way.
Could you hang larger tools off one side of the two rails?
Could you use three pipes across the middle for more rigidity?
Could you have versions that were wider between the pipes for larger tools, or more rigidity?
It at least seems like there is plenty of room for remixes!