Originally, I discovered, some time sitting around in Rockfield, that if you put an Echoplex in your system and turn off all the regeneration, you can just get one delay out of it. Echoplexes are very crude devices with a piece of tape that goes round and I started playing around and found that you could play along with the repeat that came back and it would be a very controllable situation. These days we use digital delays because it's easier, but I don't think they actually sound as good, but Echoplexes are so unreliable when we're out… You can do several different things with it; it's the whole canon effect that Bach pursued so brilliantly. Then I thought, what if you could get two, so then you could get the three-part harmony thing, which was always my dream. There's something about three guitars in harmony that has always stirred my loins and I just wanted to be able to it.