They did make the tank in gray/blue and green/purple, if memory serves.
No purple, just Green/Dark Grey and Grey/Blue. Only the bulldozer mold had the classic purple pants.
If you swapped out the dark grey parts from the first release to replace the blue on the Joe Fixit version, you could make a pretty good black and white movie Frankenstein.
Sharkticons don't need someone to tell them how to eat.
Thanks! Not having handled the mold before I mulled it over for a while. But once I saw how it could be disassembled and masked (what couldn't get the former was easy enough to work with the latter), and how little really needed changing, I decided to go for it.That looks really nice, great job!