@ossobuco,
Ok, the bread came out great, though I'll never do it the same way again... way too wet, and I had to keep adding flour. But, having done that, it's a toothy bread with delicious flavor and great texture including the chewiness I like, more like the homemade ital breads I'm used to - I'll certain try the buckwheat with unbleached flour again and fool around with the water.
I think I probably added too much biga, as the dough had a strong will to stay sticky - but on the other hand, that is probably why it is so chewy and good.
Well, I'll play with this again, and write up the info when I work it out.