You had an SOHA amp at one of the earlier meets, didn't you? The new Stacker amp is an improved SOHA, right? I scanned through the posts but thought you were probably familiar enough I could ask you the high points here. Will the new amp use op-amps driving tubes or just tubes? I see some mention of increasing plate voltage. Was the old plate voltage down too far on the load line? What other changes are being done or proposed?