Stuart FlaK (spob 20, unit 111)
 

I found more info on these Stuart "funnies": https://tanks-encyclopedia.com/light...-flakvierling/

What's relevant to the game:
1. remained in use after war (end date can be extended to 12/46)
2. crew was 5, not 3

Re: Stuart FlaK (spob 20, unit 111)
 

Posting here to avoid making a new topic. I've managed to get hold of a couple of "new" books - B. Dimitrijević & D. Predoević The Allied Armoured Units in the Southeastern Europe during the World War Two (sic) (2016) & S. Odić, Desant na Drvar (1980) with a few tidbits of info relevant to the Yugo OOB:

One CV-33/35 LF was present during the Raid on Drvar. Therefore, UNIT 451 start date should be 5/44. Same goes for FORMATION 035.

UNIT 454 (M15/42) - mentioned as used in combat in 4/45. Therefore, start date should be changed to then.

Captured PzKw II J is mentioned in use 9/44-12/46, though probably only a single tank saw actual combat.

Re: Stuart FlaK (spob 20, unit 111)
 

I've looked up something I've neglected previously - engineer/sapper units. There existed "Company"-size units as well. Obviously, they varied a lot in size (though always smaller than rifle companies), but I'd say in game terms they could be represented as:

Partisan Sapper Co - available 1/42-12/44
HQ - 1x Partisan Sapper (UNIT 044)
Platoon 1 - Partisan Sapper (FORMATION 106)
Platoon 2 - Partisan Sapper (FORMATION 106)

Engineer Co - available 1/45-12/46
HQ - 1x Engineer Sqd (UNIT 052)
Platoon 1 - Engineer Pl (FORMATION 105)
Platoon 2 - Engineer Pl (FORMATION 105)

This is from Anić/Gutović/Joksimović: Narodnooslobodilačka vojska Jugoslavije (People's Liberation Army of Yugoslavia).

The other thing that could perhaps interest you is that the Ustashe had a number (5-8) of improvised armoured transporters. If you feel they're worth adding, they'd have the following stats:
Date: 5/42-10/43
Speed: 18
Crew: 3
Carry: 12 men
Weapon: Schwarzlose HMG (turret)
Armour: 1 all round
Survivability: 2 (fairly ramshackle)

This is what one of them looked like:
https://i.pinimg.com/originals/e8/73...ae85f74b3e.jpg

They would also need a new Formation. As far as I can tell, they were used as single support vehicles, no sections or similar.

Re: Stuart FlaK (spob 20, unit 111)