Tom Bliss: Here's the thread title "So How DOES one Request A Gig ?".
Now, I'm sure you know a lot about guitars and you certainly mentioned lots of names (I've never heard of any of them) and I would not dream of getting between a musician and her/his instrument ..... However, what you have just described is how not to get a gig. Never, never, never change the guitar tuning during your performance. Pack enough gear to handle your show. Trust me on this. I don't know you and you are probably great (I'll check out your link) but I swear, as soon as any performer decides to change the tuning, I walk out.