Can't help you with DP George, but I can relate to upgrading. I've been considering upgrading my Logic Pro, but I have about 1,500 projects using an older version of Logic. Also there are a few quirks in my present Logic that I've learned to work around. I imagine my "work arounds" won't work in the upgraded version. I could keep both versions of Logic Pro, but it's a massive program (70+ GB). I did know a musician that uses DP, but I can't remember his name. If I remember, I'll send you his Facebook page.

Best, John smile