Hearts of Iron 4 Project Help Needed

[The Norwegian Guy]

Hello. I am working on a project for Hearts of Iron 4, introducing extra vehicles, here is some examples

What i need information on is what kinda vehicles was used in certain type of units:

• Panzergrenadier-Regiment - Only 251/1? Or 251/x as well? I thought other 251 type vehicles would serve in respective units which fits with its purpose.

• Pionier-Battalion/Panzer-Pionier Abteilung - Same issue.

• Panzer-Artillerie-Regiment - Here, what type of vehicles would serve here? Except Artillery vehicles? Halftracks as well?

I am aware that in reality, a lot of the halftracks which didn't exist would be replaced with trucks.