We poke. We joke. We tend to play. The DVD's that expose the directors decisions to cut, drop and walk away from what's fallen onto the production room floor. But rarely ever. Do the masters of music expose their creative growth. The Beatles. Yeah. Led Zepplin? It's about to happen. Engineer Ron Nevison will auction off the extremely rough mixes of Zeppelin's Physical Graffiti. Which includes Kashmir and Custard Pie. The auction also includes raw roughed up attempts from the Who, Bad Company and Eric Clapton. This is ‘Kashmir,’ which at the time was called ‘Driving to Kashmir,’ without the keyboards and orchestra.