Chris R./Roy Mustang
I'm glad that this is something that is useful, then. If it can assist other worlds, then I have belief that the Philosopher's Stone will be useful, as well, perhaps even more powerful and able to fully cure things.
I believe this would call for another meeting in person. The information is highly classified in my own world, and while I trust you completely, I do not trust others who could potentially read this. If they'd allow me to come there, I can explain in person, or if you'd rather come here again, you are more than welcome.