Need a measurement for Z tubes

I’m working on a bracket/feet for my portable lowrider. The concept is that I want to stiffen the bottoms of the Z tubes for transport by having a bracket that can hold them together at the bottom.

Does anyone have the center to center measurement for the z tubes? I can get close with a tape measure but I’d rather go with a real measurement from the CAD drawings.

Thanks!

Importing the dxf file for the Y plate into CAD and measuring the horizontal distance between the bolt holes for the 2 Z rails as 180.8mm

Assuming that both of those bolts hold a skate bearing for running the Z tubes, then the spacing there will be the same as the spacing for the Z tubes themselves.

This also jives with the DXF files for This aluminum XZ part on Thingiverse

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Thanks for the sanity check… this matches with the 18ish measurements I had with the tape.