How the fuck u even get 4 Alpha Bridge pieces in the first place?? All that drops for me is Fire Crest, B.L.I.N.D., and the Reclaimer chest piece,(reply>), Get to lvl 40 in under ground and you can buy the 268 blueprints. And blind set too,(reply>), I honestly did get lucky. Try the DZ for AB pieces thats where My drops are from,(reply>), You have a very bad luck ! xD