I've searched the net but i'm totally confused. So every es339 model has 2 neck variants, the 'thin' 30/60 and the fat one... But i see folks advertising guitars as the '3399' with a '59 neck. is this the same fat neck or a different 'fat' neck shape. Also, as a second question, I read there is a question over if there is any difference at all between standard and custom shop 339's? I read they are all made on the same production line... Can anyone help here?