Steve, long time no see! (you bought corals from me a long time ago back in Boca)
That plan sounds good. I would just quickly check some
relatively recent threads on what people are recommending for courses of treatment of MENs to make sure that you understand the process and when you communicate with your friend that you know that he knows the process.
Also, just make sure that there aren't any broken pieces of montipora back on/in the rocks for the MENs to eat while the main colonies are gone.
Best of luck on treatment!