@jaytor I have seen a few instances of Takatsuki failure over the years, not really enough to concern me greatly. Don't recall any instances of WE failure. I do agree warranty of great importance, but this dependent upon how hard tube run in any particular amp. If warranty was major issue, I'd go with WE or EML XLS. As for warranties, I have heard of issues getting tube manufacturers to honor warranty, claims of amps running excessive plate dissipation.voltages.