Call to the gods if I cross your path,
and my silhouette hangs like a body bag.
Hope is a moment,
now long past.
THE SHADOW OF DEATH IS THE ONE I CAST.

If the SHA-20 is the Speedster V, this here is the original Detalia.
It comes as detailed as I could make it before losing my mind.

Usable equipment:
-A single, stabilised 150mm cannon (AG3)
-A coaxial machine gun
-a turreted, stabilised minigun
-a 50mm autocannon (AG4), on the same turret as the minigun
-enough health to survive basically anything you come across
-a hatch on the turret (AG2+throttle)
-stabiliser legs (AG1+throttle)

Fancy stuff:
-1000mm of frontal composite armour, on both the turret and the hull. On the hull: 1 plate of ERA; a thick, steel, self-sealing tank of tar (yes, really); a slab of rubber and finally a plate of hardened titanium. On the turret: 1 plate of ERA; 2 plates of hardened titanium; 1 slab of rubber and two more plates of hardened titanium.
-ERA coverage of the front and side of the tank, with the exception of the front section of the skirt, where damage to the tank is unlikely. (Side note: you can imagine any ERA as being retro-reflective panels or radiation-absorbing panels, pick your poison)
-Actual shells inside the tank, and a maximum ammunition count for the main gun in compliance with them
-Some lockers in the turret
-Several wireless optics, including one that moves along with the minigun turret
-Square (ish) rounds (again, really. These were actually real, and insanely accurate. Look it up.)
-A radio and two first-aid kits near the driver.
-An engine that kind of actually looks like an engine, though not as nice as the Detalia’s
-Other stuff i’m too lazy to mention, like how there is spaced armour all over the place. Have a look around.

Small issue:
If you accelerate hard with the gun slightly elevated, it’s mantle can get wedged in to the turret. A simple fix is to speed up gently, and then brake full force - though this can make the tank do a handstand.