Includes two unique crew figures to be used alongside the generic Artillerymen. Scaling advice can be found here.
The Quad Tractor used in the renders was found here.
Includes a separate gun, figures, firing platform, and trailer. Lychee files are also included from which the pre-supported versions were exported.
Note that I'm not 100% satisfied with my scaling. The individual STLs might be a bit large. In the Lychee scenes (and the pre-based/supported versions I exported them from) I scaled the gun down to 95%. I'd go with what looks right to your own eye!