I recently bought an adjustable injector from Rudy Vey (thanks Rudy). He included a cartridge of blades with it.
I just loaded my first blade into the Injector, and it appears that the next blade from the cartridge will push out the first one when it is time to change blades.
I am not at my last blade yet, but that brings up the question - How does the last blade come out? (In case I want to store the Injector and go back to DE for a while)