I finally took the time to tidy up my Predator file data base all of which were .PDO's that I have been collecting over the past several years. Unfortunately I cant give credit to the original designers because I no longer have access to that information. This is extensive collection of heads as you can see that have been converted from .PDO's to the best of my ability, thus far. I could have loaded them individually, but time is precious. So here they are in all there glory. Please if you do take the time to slice / remix any of these as a printable item. Please upload them back to Thingyverse so we can all enjoy, Cheers Jace