It's a busy programme on Friday as Lammo runs down 6 Music's Axe Factor Poll. Forty years on from their heyday, Jimi Hendrix, Jimmy Page, Jeff Beck and Eric Clapton continue to top 'Best Guitarists' votes. But what about Jonny Greenwood or Slash? Surely John Squire and Johnny Marr are every bit as influential as the greats from the 60s and 70s? Contemporary fret wizards are often over-looked, so we've come up with The Axe Factor - an endeavour to find the best guitarists of the last 30.