Awesome design! The details make this look convincingly like a tank, and I never saw a better recoiling turret in starmade. I especially like the antennae and what you did for the engine grill.
However, the lack of ability to aim the gun itself and actually see what you are doing is a little disappointing, but all in all, an awesome build.
If I try to build another tank I'll look into doing better viewports which remain independent from the main gun (maybe with different positons for gunner, commander, driver and mabe others).