Not willing to pay over the odds for what the rainmakers pack goes for these days (or even when it originally came out since it never hit the UK), I made my own. Honestly, I like the silver chests more than the all solid colour anyway, and never liked the battle damage so that was left off. Ion Storm is just a straight up Thundercracker, with the justification his electrical powers are much more intense than Shrapnel, and cause scorching on his armour as he tries to contain it. Although I may paint his grey chest silver to match, and go over his black bits to remove that battle damage. Acid looks a little darker in the first picture because of the light source, but he's meant to be the lighter green of his alt mode pics.