:o Simple Geometry oops.
I think I have a solution, but I will be testing it before I release the files.
Sorry 'bout that. I've taken the download out of service until fixed. The braces are not strictly required in order to use the panels (my prototypes don't have them for example), but the corner edges require some better support. It's a tricky area to support because of the overlapping flaps.
Sean
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