Just wanted to update you all. I spent some time Friday AM troubleshooting with Tony at Cookshack. Checked all connections, RPMs, Voltages etc. and everything checked out perfectly. This ruled out about everything but an airflow problem... DUH!
So I removed the cap on the flue and tried to cook at 200 deg this evening (adding a little flavor to some ribeyes!). Temps ran just about perfect 195-205... I'll take that.
The flue wasn't particularly low (bottom edge about 1/2 inch above top of the pipe.) But this did make a huge difference in temps. So I put it back on basically as high as I could put it and have it be secure, just to have a cover on it... Temps were running great.
To top it all the ambient temp was about 30 degrees higher than when I was having problems. I'm guessing this did the trick, but will continue to monitor and test over the next few days.
Thanks go out to Eddy for your help (and this great grill) and thanks to Tony and the great customer service at Cookshack.
Nordy