@biodom: Thanks very much for the clue about the drop-down selection box for the SP20 firmware version. I didn't notice the "down arrow" and assumed there was only one. I see several other TEST versions now.

@zvi: Thanks for elaborating on the 2.6.7 and 2.6.14 versions of the firmware. I's really nice to have that kind of insight. I also appreciate that Spndoolies has a a true technical guy on here from time to time, and not strictly a "corporate mouthpiece" to dispense the company line.

While I only have about 10 hours on the 2.6.14 firmware it's vastly more useful than 2.6.1. I haven't been able to coax the fan below 10 yet, even when using auto, I think I'll be able to make good progress with this.

Thanks again folks, and Spondoolies!