In looking at the below picture I see the radiator is a different shape on the Benz BzIIIa engine than the BzIII (of course). I think changing the shape is within my kitbashing/scratchbuilding capabilities. I'm trying to figure out what is the semi-circle thing above the propeller and what would it have been made of (so I know what color I should paint it). As always, thank you so much.
