Re: JB jr
Super Distortion S in the bridge, hands down. Nice and full with plenty of highs (unlike the Hot Rails).
Of all the crickets I received when asking about the JB Jr. Neck model here on SDUGF, there's absolutely no way it could be widely regarded; rather it's better described as a diamond in the rough. I use one with a TB-12; the SJBJ-1N is a phenomenal neck pickup.
However, with the SD-S in the bridge, I'd take the Satch Track, no question.
Lil' Screamin' Demon Bridge for the middle.
If you want a scorcher for the neck, FT2 all the way.