What are the differences between the first Model T's, the second generation Model T's and the Fender reissue Model T's? I am interested in this amp and would like to know more info about them. Are the reissues just as loud as the originals? I read the originals had 6550's and KT-88's and the reissues have 6L6's, is this true? I figured you guys would be the ones to ask, because it is hard to find info on these amps, especially the vintage ones. Any help would be appreciated. Thanks.