I just purchased a late 95 or 96 model WT800 and Eden quoted me a price of $300.00 to bring it up to 2002 specs. Has anyone here done this? What all do they upgrade? I did notice a slight difference between the WT800 and my 2001 WT400. The WT800 seemed a little more muffled with the same settings as the WT400 after playing our 1st set the other night. Would swapping out the preamp tube make a difference? If so would you recommend getting a tube from Eden or buying one elsewhere and what is a good tube to replace my current one with? Also I'm running the WT800 bridged mono and noticed I got more volume turning the balance and crossover knob to the extreme left? Anyone know why? Help me fellow Eden players.