I totally disagree with your assessment on Truefire’s song lessons. There are easy versions posted of all their songs but in the as recorded sections they are spot on. I think you should try scrolling through the song lessons to find the heart of the material. Layla is a slide masterpiece with everything included. Concerning the Van Halen songs, Chris even says he has listened intently to make them as pure to the original as possible. He says you can listen close and you may find something, but it definitely sounds pretty authentic.