You asked them to replace it..
im wondering, if in the process of a warranty based turbo replacement, if you can ask for the turbo itself to take elsewhere (protege garage) and then give it back to mazda to install. my dealership probably would since i'd be telling them the truth and they would be enthusiastically happy that i was going above and beyond to ensure the health of the car, but i wonder if anyone has sacrificed a couple weeks to do this.