Not for David but other wanabees, there is nothing to beat the old Mark 1 for a bit of S&M.
Docs swore by it, tough as old boots, much stronger than Mk 2, why, look at this one cracked open after a motorbike crash.
Took bl**dy years to convince them that we carried the Mark 1 helmet and wore the Mark 2 one; not least because the Mark 2 had the electric string.
Have the modern ones got over the asymetric earphone 'problem' of the mark 2?