That is so totally awesome!!! Barb_MO, thanks for taking the time to explain it - I need to study that a bit to totally "get" it, but it does make a lot more sense already! The tube concept is another story, it'll take a while for my brain to wrap around that one. But the bargello idea itself is so cool - the effect can be so stunning!
Ok, how many years will it take for me to get through what I've started already to get to this?! Maybe I can squeeze in a smaller one just to play with this....
I'm going to print off your instructions Barb, so I have them in my "quilt file". :-D