[Imp]

Yes do it in MBT or you wont get ATGMs ERA etc. Very long process as will have to overight an OOB with a WW2 one by building it yourself, cant copy it.
Marcello I think did a partial German one try doing a forum search in MBT.
Bit of a turkey shoot even a decent IFV will have fun, faster to position for flanks & way more accurate. Couple of ammo trucks & mortars so can place smoke for it to hide behind & thats it. Merk with amount of dischargers it has nobody should ever get a shot at it not that its a problem even from the side few units could scratch it.
Therefore lot of work just to provide target practice in my view.
Just do present day Israel vs a 3rd rate country if you want a turkey shoot at least they will have a slight chance. Say Lebanon or any African S.American country or reinact the Gulf Wars