Working on turning a spare Tailgate into Peridot, but I had no plans for Groundbreaker. I soaked it in the yellow dye tub to see what would happen, and while it didn't get as green as Tailgate's shins, it ended up at pretty close to the Torchbearer (Victorion) color scheme. Since The Transformers #46 establishes that there's more Torchbearers than just the Victorion team, why not a Mini-Con Torchbearer? Caminus has energy troubles, so Micros would make sense.
The yellow residue is almost invisible under normal lighting conditions, didn't really notice it until looking at the photos I took.