I'm still unsure of how yer color method is, but the cylinder part of the leg... knee of sorts is plain metal, no red, and below it i think is an orangey peice. (among other color detailz)
I really don't mind the red instead of the orange-ish from the original but the rest i kinda agree.
- The cylinders in the legs that look kinda like knees on the legs should be black with the tip grey, like the original.
- The parts that attach the cylinders to the tip of the legs are yellowish on the original, would be interesting seeing a dirt yellow on those parts here too.
- The head is supposed to be red/main color of the scorpion, while the handle in the top of it is in fact black.
- The "ventilation" behind the torso is grey.
- The bolts in the begining of the tail are yellowish.
- The tip and back of the gun arms are also black.
There are several other things but with the discrepancies from this new model to the original one, they're hard to point out; after all it's supposed to be a graphical update faithful to the original one. Still hope there will be time to add the hands in the guns and the search-lights.
Last but not least, i like your style and you have some magnific skills but i kinda feel there's an overuse of the metal scratches on the model.