The SatelliteGuys Radio Show post on the main page reminded me I need to drop Gregg an email for my dlp calibration. So Gregg did my RPTV a fews years ago . Awesome job. I now have a Sammy 72" DLP ( bulb set ), purchased in Aug 08. My question is this. With a bulb set, when's a good time to get an ISF calibration, since the bulb will always age? I know RPTV guns age as well, but I suspect it's a slower pace than a bulb? Good question for Gregg, if I don't make the chat tomorrow night.