I watched David Gilmour's Royal Albert DVD last night and I was blown away by his tone with his Gretsch Duojet. What are the in and outs of this guitar? I understand that like many classic guitars, it's been reissued in several variations. I assume Gilmour was playing an original 57 but I don't know. Do they all sound this good? It had a very sophisticated, thick sound with just the right amount of edge. Thanks.