I just did the upgrade with no problems. One note, the instructions say to "push the button" to service mode. Since I can not see the back up the unit, it took a few tries to figure out it is a slide switch that should you need to "slide down" rather then push.

Use W2K/usb and the upgrade worked fine. W2K did however say after I was complete, I needed to reboot for the new device driver to take effect. Ooops.. Oh well it worked anyway...

Nice job on the bass matrix and the new PLII processing.