In addition to actually eating gadgets, V2 also ages slower and is more heavily benefited from Heavy Metals (they can even use it as an emergency food store). While they're generally inoffensive, don't let your norns harass them. If attacked, they will retaliate quickly and painfully.
In addition to the agent that lets them eat gadgets, the Metallophagus Grendels V2 bring along a special food item with sprites helpfully donated by Mea.
To wrap things up, I'm also uploading V1 of the Metallophagus Grendels since originally they were uploaded on Mediafire. I released these over a year ago (I thought these were a recent breed - hey, time flies).
(You can also download these at Seeyou7.net if you wish)
You might have noticed that the pictures look a bit different. With some help from Firebug, I replicated the image style from Naturing :: Nurturing and Jessi's Creatures Documentations. I think the photograph-like style fits, but of course your mileage may vary.