I was playing my Warrior 5 string today and at both an indoor concert and an outdoor festival my A string around Bb - C and my D string from the nut up to around G had problems with sustain when I'd punch it. The strings sounded more like I was playing through them rather than a clear tone, and often the note would die so clearly that it sounded like a short in the cord. No problems farther up the neck. It has Barts and a Bart pre with DR Hi - Beams. I've never had this problem before, although long ago I had a tendency to play through lighter tension streets, but that's long gone. Ahh, I mention weather, because it was rather cold and damp today.