Just an update as Desmond and his team have now got permission to scan and include quite a few more magazine titles, including International Musician (and recording world), which was my regular purchase in the late '70s and a lot of the '80s. Despite the title, it mainly covered guitars and amps, with some keyboards and drums. They haven't actually scanned any of those in yet, but it won't be long before they do. I'm looking forwards to re-reading some of the reviews in those. They were often quite technical, with amp outputs being measured (which is where I learned that a 100W Marshall JCM800 head actually produced 180W flat-out, something that always stuck in my mind).