Moved lens 3 from -43.6" to -42.5" as measured backward from the cavity mirror. This time the transmitted power went down from 6.2 to 6.0W. I changed the position back to -43.6" and now have >6.6W transmitted. This is the best we've seen for a while and gives ~1500W in the cavity. Will take polarization run before turning laser off for 3.3GeV running.