Back to pentode? That's interesting news. I too am enjoying the Ella in pentode, though I'm running the KT-88's. After hearing it in both configurations I don't think I'll ever go back to triode. There is something just right about pentode. More clean,focused and DYNAMIC! How are the new quasi 4 Pro Pi's sounding? Did you adhere to the proper Pialignment(1.92 ft) or did you go a little bigger? Jerrod