Just a brief follow-up here.
When I posted my M10s and M36s I lamented that I could not find my M20s to complete a full TD company.
Well, I found them.

Here is an overhead view. This pic is taken in indirect sunlight.
I didn't have to do any real modelling on these pieces. Just some touch-up painting. They had all been put together and painted years ago.

This view is taken with different lighting. Makes a substantial difference. This pic was taken under fluorescent lights.
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Each US Army TD platoon had 4 guns, and two scout cars (for the CO and the platoon SGT.
There are three platoons. The platoon leaders are in M20s posed standing with binoculars (from artillery crew sets). This makes it easy for ME to determine which is the command vehicle. The platoon Sgts are just manning the .50cals in their M20s (being the practical types that most platoon Sgts seem to be).
In the pics I have 1 M36 and 3 M10s in each platoon, but I can vary that ratio as I see fit with the extras I have.
The company HQ had a recon section with two scout cars recon section, a maintenance and supply section, and the CO and XO each had jeeps. I gave the CO a jeep with the tarp up to help me spot him on the table.
I am going to keep the HQ elements separate, so that they can serve my M18 TD company as well as my M10/M36 TD company. I also have a full TD company for Tunisia with M3s (with a platoon of M6s if I want 'em). That company has it's HQ vehicles boxed with them, as the M3 Scout Car was used only in Tunisia, but both the M3 TDs and the M3 Scout Cars were replaced by the time the TDs were in action in Italy or ETO.
I tell you what, this project took me a lot longer than I expected. After all the crew figures I have painted up over the last few projects, I think I'm done with vehicle crews for a while. Maybe just some tanks or something simple -- a little painting, some detailing, some weathering, and bang I'm done.
Yeah, that's likely…
-Mark
(aka: Mk 1)