Find more info about Registry Of Guitar Tutors here: http://www.rgt.org/
Buy a digital copy of Total Guitar here: http://bit.ly/Buy-Total-Guitar
Download Total Guitar issue 277 for the accompanying explanation - available in the UK and, digitally, worldwide via Newsstand for iPad, iPhone & iPod touch and Zinio (http://www.zinio.com) from 12 February 2016.