where most Kramers from that time were poplar (maybe alder, rarely maple) with maple necks and generally rosewood boards, the nightswan is mahogany with maple neck and ebony board. from what you're describing, it almost doesn't sound like the same guitar, which I'm guessing could probably be the differences in our respective amps.
after looking at your OP again and considering the BKP catalog, I'm still wondering about the A-Bomb or maybe an Aftermath. someone with hands-on knowledge of the Juggernaut would be your best bet on that one.
it is simply my opinion and observation that a company like the one behind the other pickups mentioned in your last post will most likely make choices over the span of 25-30 years when it comes to suppliers and what-not. so things are going to shift a little. there is a video out there of one of the models you mentioned spinning on a winding machine, without any human hands involved...as in, a machine is programmed, they load the bobbin and push the 'start' button. no quite what was going on in the 80s. and that's why I went on the hunt for some 80s models made by MJ for my Nightswan and then I ordered the same models from her in the custom shop this year for the Shredder.
the mass-produced method some companies use just doesn't quite do it for me in the same way, and that's why I like my BKPs so much.