I originally posted this yesterday in the amps and cab section, but I think it makes more sense over here. I just picked up a gorgeous, bone stock '62 Princeton. Quick question: I'm going to put in some NOS preamp tubes I've got hanging around. The tube chart calls for a 7025 in the first position. Are there any potential advantages to putting a 12AX7 in this position vs. the 7025? Any reason to absolutely stick with the 7025? I've got a NOS RCA 7025 and lots of old RCA/Mullard/Amperex/Mazda 12AX7s to play with. Thanks!