The models includes all you need to create a number of different versions. Two types S3 kazemat for light machine gun (M.20 Lewis), two types S3 kazemat for a Schwarsloze M.08/15 machine gun and a S4-Kazemat LMG.
The Heavy Machine Gun was placed on supports in the kazemat (see pictures).
The MG-hatch is somewhat difficult to place, rather small to get it fit correctly in the MG opening, so in 1:100 you could also not add it. I did not bother anymore.
The large parts will print fine with an FDM printer, but some details do require a Resin printer, like the HMG is resin print only. Models will scale fine up to 1:50. (However I only test-print in 1:100)
Testprint done on an Ender 5 (016mm layer) and Anycubic Mono SE (005mm layer)