Download Total Guitar issue 253 for the accompanying feature - available in the UK and, digitally, worldwide via Newsstand for iPad, iPhone & iPod touch and Zinio (http://www.zinio.com) from 14 April 2014.
Buy a digital copy of Total Guitar here:
http://www.myfavouritemagazines.co.uk/content/lp/digitalbundles/mm-totalguitar/