What about some new GVs? 
Tank Iosef Stalin IS2 Model 45  
Type heavy battle tank  
Engine V-2 JS, 12-cylinder water-cooled diesel engine with 520 hp  
Crew 4 
Length 990 cm  
Width 309 cm  
Height 273 cm  
Battle weight  46 t  
Max road speed  23 mph  
Max road range  150 miles  
Max terrain range  131 miles  
Fuel  820 litres  
Vertical obstacle 100 cm  
Trench crossing  286 cm  
Climbing power  36° 
Armour, turret front  160 mm  
Armour, turret side  110 mm  
Armour, turret rear  100 mm  
Armour, turret roof  30 mm  
Armour, hull glacis  120 mm  
Armour, hull side  95 mm  
Armour, hull rear  60 mm  
Armour, hull top  30mm 
Armour, hull bottom  30 mm  
Main armament 122 mm D-25T gun with 28 rounds  
Muzzle velocity 1690 fps (HEAT),
2625 fps (HE)  
Shell weight  24.9 kg Armour piercing (HE), 13.2 kg HEAT, 22.6 kg HE, 24.9 kg HE-fragmentation 
Penetration 500 yds  200mm/0° (HEAT), 145mm/0° (HE)  
Penetration 1000 yds  200mm/0° (HEAT), 145mm/0° (HE)  
Penetration 1500 yds  200mm/0° (HEAT), 145mm/0° (HE)  
Penetration 2000 yds  200mm/0° (HEAT), 145mm/0° (HE)  
Secondary armament  2 x DT, 1 x DShK -MG 
Production from November 1943. 
