i just threw a Nailbomb neck in my Agile Septor 27". i'm really digging it so far
. it's plenty hot to balance with the Dimarzio X2N7 i have in the bridge. it's pretty bright, but not an ounce of harshness. still articulate even when soloing on the low A and has just the right amount of grit to it.
overall, it's probably the best 7 string neck pickpup i've played.
this is the first BKP i've tried so i don't have any others to compare it to. i do have an Warpig/ Cold Sweat set heading my way so i'll see how it stacks up to those.