Well, here's another tank, this one made in Inventor. Structural weight is about 49.75 short tons, or around 45 metric tons.
Front:
Side:
Top:
Bottom:
Back:
Iso:
Dimensioned, Feet:
Dimensioned, Centimeters:
The gun caliber is 4.125", around 104mm. I'm also working on a version that has an 8" (~208mm) howitzer, sort of just for kicks. Armor thickness on the front plate is about 141mm, though it has a high angle. On the turret front it is 343.98mm, sides are 81mm, and rear is 38.1mm. Should probably add some more on in those areas come to think of it. The ammunition storage can hold around one hundred shells and the turret is entirely automated, as the crew cabin is going to be in the hull. Yes, it is an alien tank, because a human would have a hard time fitting in there comfortably.
Also, the hull dimensions are 15' x 15' by length x width. Gun elevation range is -20/+20 over the front or rear, over the sides depression is reduced. Armor thickness on the hull is pretty much even all around.