320mm rocket carrying pioneers

[BigDuke66]

In an "orderly" firing position and used as artillery they surely were transported by some kind of vehicle, but I doubt that they were even able to move them inside Stalingrad by any vehicle at all, while a single rocket with the crate is surely heavy it is not unmovable by infantry.

And of course they were not use inside a house but to fire on some kind of enemy position, bunker, house, strong point etc. or as said to stop some Russian assaults/advances.

Anyhow while I like to have even such misfit units in the OOB, if more common devices like the Molotov Cocktail or others are not in use by the Pioniers I would prefer to see these things covered first instead of this misfit equipment.
The Rohrladung was just there to remove obstacle, in game the engineers already do that without the need for any equipment so that hasn't to be added as weapon.
BTW is there any difference between a satchel and a demolition charge?