@sabih -- you complained about McIntosh's poor communications with you that required multiple back-and-forths to get an answer, but your own postings leave me a bit confused. I've read the thread twice and it's not clear to me if they are simply refusing to provide the file for you to do the update yourself or if they have refused to update your D150 even if you send it back to them for service. What's the story, or is there more to it? (For example, they'll do the upgrade if you ship it back but they want to charge for it.)