Misc simple:
50 OA vz 27 - first date 4/39 is an error (later than the second one) - it should be 1/30, and 072 formation should be modified accordingly.
Desert icon is a different car, should be 4022 or rather basic grey 4023 (they weren't supposed to operate on any desert anyway)
Drive type should be wheel only - they used an over-sophisticated 4x4 drive, in which only one axle was driven at a time, depending on a direction... (Charles K. Kliment, Vladimir Francev: "Czechoslovak armored fighting vehicles 1918-1948")
66 Praga RV - Polish OOb uses icon 138, which seems to fit better (upper view
http://panzergarage.com/WebRoot/Stor...ga_RV._atr.png)
137 Skoda 903 - according to this Czech magazine
http://www.jan-tucek.wz.cz/clanky_od...mobil_9_15.pdf Skoda 903 6x4 car wasn't in fact produced for CS army. Only 2 prototypes were built before the war, and only a small batch of 42 vehicles was produced in 1941 for Germans (intended for Yugoslavia).
It could be removed or better changed to generic Tatra staff car, representing a family of most typical 6x4 staff cars in CS army (T26/30 used from 1930, then T72 and T82). Photo might be 8904, although it is later wartime model T93 for Romania.
(photos of T72
https://i.ytimg.com/vi/DQJiDffDOtE/maxresdefault.jpg, T82:
http://i.wheelsage.org/pictures/t/ta...rototype_1.jpg,
https://c1.staticflickr.com/9/8001/7...06ba294f_c.jpg )
They can be AT-wheel vehicles - in Czechoslovak army they were treated so, and their 6x4 drive gave them improved off-road characteristics.
Same for Slovak unit 137
138 Tatra Truck - same as above with AT-drive. They were in fact truck versions of same 6x4 vehicles. Better icon IMO is 3179 or 2138 to mark their smaller size, similar to cars.
Same for units 13 and 142 and Slovak units 13, 138, 142.
139 Praga AV - photo is Tatra T93, correct is eg. 23170. Same remarks as above as for AT-drive.
Same for Slovak unit 139
143 1&1/2 Ton Truck - standard vehicle in Soviet-organized armies was 3/4t Dodge (photo eg. 20685 or 19037), 1&1/2t Dodge was rather an exception.
155, 169 Avia B.71 - photo is German, correct is 2256
170 Tupolev G-2 - improbable as paratroop transport in late war period - should be just Lisunov Li-2 (#220 in Soviet OOB)
255 Tancik vz.33 - Delivered only in 2/34 (6/33) (as unit 008) - needs change of formation 103 Police Tank Pl (actually, they weren't used as police tanks, but in ordinary armoured regiments, and later border units)
There was one funny armoured car worth to add:
PA-II Zelva (turtle)
http://www.tanks-encyclopedia.com/ww...A-II_Zelva.php (according to Kliment's book, a designation OA vz.23 was only a planned one).
Unit 050 OA vz 27 (PA-III) can serve as a direct pattern, an icon 3255 of Humber scout car would be almost ideal (albeit green), and there is even a photo 9316.
According to Charles K. Kliment, Vladimir Francev: "Czechoslovak armored fighting vehicles 1918-1948", it could develop a high speed 70 km/h on road. Drive type should be wheel only as well. Used from 1/30 until 1937, when they were sold to the police (there could be the second entry, for formation 103 Police Tank Pl).
Of course, no more than 2 of its 4 MGs could fire at one target.
That's probably all regarding Czechoslovakia.