Summary

British heavy MBT meant to support the Centurion against heavy Russian tanks, such as the IS_3
Both were replaced by the Chieftain

model in full dimensions in blender 2.79b and scaled to 1/100 for the .stl file
scale down to 35% in the slicer.

as usual, the dice are 15mm for reference
if I can't print it, I don't post it.