I design primarily for the Interwar and WWII periods, and in 1:100 scale for 15mm gaming.
These days I print models almost exclusively in resin, but wherever it is feasible I design with tolerances suitable for FDM as well.
This was an agglomeration of captured equipment, quite extensively used by the Germans in WWII. It consisted of a Czech 47mm anti-tank gun mounted in an open steel box on top of a French renault R-35 tank. They made quite a few of them, somewhere in the region of 130. Many were encountered by the Allies in Normandy and afterwards.
This is a 1:100 scale model for 15mm gaming. It consists of two parts: the superstructure/gun, and the hull/running gear.