I did change the bridge and tone pots in the SG to 500K for both, and changed the wiring from "modern" to a 50's wiring scheme - zero loss of treble when you roll down the volume pot. This all combined definitely gave it more edge, and of course the SD. I like this talk of a BKP interpretation of a SD. The SD is a great sounding pickup. I just think I need a tighter, spankier, and brighter guitar for it to work best.
Today I tried yet another SG 61' reissue with the 57 classic + in the bridge. It's nowhere near the tone of the SD, but, those upper spanky mids are definitely there. 1 thing I realized, I love pushed snarling mids - that vowel sounding PEEE—OWWWNG effect of playing the A chord hard, directly over the bridge pickup.
I brought in my amp head today when I tried out the SG reissue, and my SG standard with the SD. There's this snarl that the SD has, and I'm so addicted to it, that other lesser output pickups just don't seem to feel as satisfying. I noticed that the 57 + kind of got spongy sounding as I applied more pre-amp, it's not nearly as firm, tight and immediate as the SD, but it did have some spank. The mids on the 57 + are softer, not as pushed or in your face as the SD.
I think in my fantasy world, the ideal pickup would be higher output — like the SD, but with a bit more upper mid spank, and maybe a bit less thickness to the low end, more snap and clarity basically. I still don't think it would hurt to try a few different pickups, just for reference, and probably similar in output to the SD, but maybe Alnico 5?
— This should probably be a new topic, but since we're here... I have a 2X12 Mesa Rectifier cab, on indefinite loan. It's 14--1/4in deep . It has 2 V30's in it. Could I tighten up the sound and low end with a more standard depth cab, like a baltic birch 2X12 that's the more standard 12 inches deep? I'm wondering if the WOOF I hear from the speakers can be attributed to the depth of the cab?