Thanks, Dave.   I did consider that, but I had no prior experience working brass, and my research indicated that 360 alloy (which I used) was good for machining, but not great for forming.  I was afraid that it my snap if I bent the full 2mm thickness.   Bending the 1mm crease went fine, though.  

I've bent a lot of various metals over the years, I've gotten away with making 90 degree bends in even 3mm thick brass (though I'm not positive which alloy that was). 360 is pretty high in lead, so I'm pretty sure it'll handle that bend. Just take it slow and work around the bend to mush the metal around enough that you don't get any thin spots.

May you have the day you deserve!