thanks for your help!
so I did the following
* loaded 'eastern_front.module' into Corsix
* changed to attrib/attrib/sbps/races/allies/vehicles/m26_pershing_heavy_tank.rgd
* amended the value of 'squad_requirement_ext/requirement_table/required/max_cap from 2 to 10
* saved it
nothing happened ingame
could you please let me know what exactly needs to be amended?