… SIGH!
It isn’t one of the acrylic boxes I’m wrapping styrene around to build a boxcar - same principal, though.
Since the RhB is definitely metric, so are the sub assemblies required for frames, the spacing of the boards on the walls etc. etc.
So it’s back to “good old” i.e. assemble U-channels from styrene strips, score the board intervals at the correct spacing etc. etc. Good thing that I have proper drawings!
BTW the “box” started out as a Bachmann kit, acquired when everyone wanted to get rid of the stuff at deal prices (ca. '99). Eight years later …