@jaynemo1962 I just recently had my DNA-1 Revision A+ upgraded to Gold Special status. Steve said that anyone with a driver board 15+ years old must have it replaced if they send it in for upgrades. My board was 20 years old and was replaced as well as a free replacement of the soft recovery diodes. When all said and done, only the case, transformer and Nichicon Gold Tune caps. remained. Everything else is new. Biggest improvements I hear are openness of soundscape and dynamic ebb and flow. Low level detail is superb. All this for a very reasonable cost considering how much was done to it.