sure, this has the potential to be a nightmare thread, but wth, i'll start it anyway. well, we all know strats have their "quacks", while lps and teles have their "chirps". i know i'm probably in a small minority when i say it, but i really, REALLY value the sound of both pickups engaged. i have kept pickups that i was otherwise unimpressed with on their own, to retain the sound of their chirp. and i have sold pickups that sounded very nice solo, but had no luster in that position. so i took my three lp guitars in the last week, and did a little magnet swapping, to see if any one combination had it in spades, compared to others. granted, this is totally anecdotal, and my definition of sublime chirp could be vastly different than yours. generally speaking, this is what my non-scientific research concluded. the best matching of magnets seems to be both pickups having some form of an a5 magnet, whether they be uoa5, short 5 or regular. all three guitars (and all the pickups that i have in them) panned that out. the worst pairing were two a4 magnets. not one of the guitars had my tonal idea of chirp with that combo. an acceptable pairing was an a2 in the bridge, with an a3 in the neck, but again, with an a5 in neck, it was even better. one guitar (and one set of pickups) had a decent chirp with both magnets being a2s. like i said, this was just for shits and giggles, but was serious enough an endeavor for me to undertake, as i truly love me some chirp. feel free to chime in with your own discoveries.