I've often considered having some cuffs with me when I'm carrying especially at home (can't exactly force a guy who broke in to stay on my floor at gunpoint.  What am I going to do, shoot him in the back on my porch if he runs?).  Flexcuffs is a good idea, although I bet the airline will be suspicious of that.  Have you talked to them about it?  How do they feel?
Oh yeah, and regarding Phoenix, you gotta at least stop by Tempe while you're there.  It's pretty cool.  Also, try the wings at 
The Vine at Rural and Apache if you're down there.  They're almost identical to the ones my friend's mom makes, and she's from Buffalo.  It doesn't get any more authentic than that.