From: Greenwood, Indiana
The Maus is a different animal, more a 'designer' unit than an obscure Soviet tank that really has no special qualitys, and in SP Enhanced , its not in the actual German oob. Its in another oob, with alot of other Extra and Rare stuff, and is available only in 1949 for designer usage.
The Soviet oob is full , so if added would have to go into the Yugoslav oob where other extra Soviet stuff is. (talking about Enhanced oobs here btw)
But would need Icon, LBM, data...etc etc...