ZU-23-2 towed version (Russian)

I debated whether this should be a derivative of the ZU-23-2 in firing position, but all the files are different (the gun is in the travelling attitude, and the carriage has separate wheels), so I went for a new 'thing'.
This is a 1:76 version of the Russian ZU-23-2 anti-aircraft gun in towed configuration. It is based on the SketchUp library contribution by Archedyne (my thanks), but again heavily modified to make it printable (if a bit fiddly) and suitable for wargaming, or to have as a scal