Well, let's see.
You got your

MOBAT.
There's the CAT from '85 which was all black w/crimson highlights.
There's the '98 version.
There's the '03 version which was red/crimson w/black highlights.
And then the '08 version from the Target Pack.
Yojoe also lists an all black Canadian (ien?) version with Cobra stickers and a European Action Force version.
By my count that is seven out of the ten, leaving just three to do.
I recommend doing one in tan to match the Mauler MBT, maybe one in Slaughter's Marauders colors, and maybe one in in Sky Patrol colors.
Or do one in a crazy camo like one of the US Navy's WWI destroyers.
Maybe just kit one out with all the extra stuff tank crews attach on the outside (tarps, personal gear, netting, etc).
How about working up a pallet for transporting in a C-130?
_________________
Hero Machine Real Characters:
https://tinyurl.com/yyguul9eHero Machine Original Characters:
https://tinyurl.com/y59j5gmdHero Machine Other properties:
https://tinyurl.com/y48nnp8u