According to this pic of my blackbird 40 with tremolo, which pick is V1? Ive read it's usually the farthest away from the output tubes, but I'm not sure if it's the farthest away in line, or the one by itself behind the rest. Could that be just for the trem? Also, the amp came with a cheap sovtek rectifier (I bought this amp used). How much does the rectifier affect tone? If I replace it, what should I go for brand wise? Thanks!