here is the Czechoslovak tier 8 TVP VTU Koncept
In 1945, the newly reformed army of Czechoslovakia was equipped with a wide assortment of vehicles from Cromwells to T-34's with a large chunk of the armored forces consisting of captured German equipment. One of the proposed solutions to the unification issue was to design an entirely new general purpose tank that would replace all the different tanks in service. The program was called TVP ("Tank for General Use") and in October 1945, the army did lay down a set of requirements for that vehicle. In March 1946, Military Technical Institute (VTU) introduced the first project of the program of a highly mobile and heavily armed medium tank that was inspired by German, Russian and British influences. The initial project was then passed to Škoda that responded on the proposal with a project of their own, the T 40. The VTU concept project never passed the drawing board stage.
Tier: 8 MT
Engine: 700 hp
Weight: 36,442 tons
Power-to-weight: 19,21 hp/t
Maximum speed: 50/20 km/h
Hull traverse: 44 deg/s
Turret traverse: 43,8 deg/s
Terrain resistance: 0,959/1,247/1,822
Hull armor: 65/40/?
Turret armor: 65/40/?
Gun: 10,5cm vz.39N (alternatives: 100mm vz.44S, 8,8cm vz.41N)
Damage: 320/320/420 (240/240/295 for the 88mm, 250/250/330 for the 100mm)
Penetration: 188/219/53 (194/237/44 for 88mm, 175/250/50 for 100mm)
Depression: -5 (-8/+20 for 100mm and 88mm)