It has always been my understanding that mr Guard left the Trio to persure his own vision, which was much more traditional and therefore less commercial than the direction that the group was heading in. Stewart was an aquitence of the group and an admirer of Guard's. If there was bitterness, it was from Nick and Bob. As for Stewart's voice, I love it still, though he's lost alot of his range{ain't we all?}. Then again, I've been a lifelong Stewart fan. Mike Bennett