Following up with results...I had it done utilizing an Ultegra 10 spd crank (couldn't find a 9-spd), an Ultegra 12-27 9-spd cassette, a Ultegra 10-spd 6600 chain. Went on sweet, cassette shifts pretty good--there's a scant few times it's chattered shifting into the lowest gears but not that big a deal--could need to wear-in a bit or better tuning on my part. Smooth shifting up and down on the chainrings. It's nice being able to spin up the steeper stuff I was bottomed out on before.