i was at one of the local music stores and saw a seymour duncan vintage j of 20$. i bought it and wen't home to pop it in. it was a neck pickup with no cover. i decided to put it in my mim zajj. the pickup cover for it didn't fit but luckily i had an olfd white one from and 80's j which fit. i put it in and now the pickguard won't fit. now when i plug it it and i just solo the neck pickup it sounds great but if both are wide open then it sounds really thin with nmo bass or treble. but if you back off on the bridge pickup there is a certain point wheere it seems to "dissapear" and it sounds like it's the neck soloed. i apologize if this is confusing ( i think it is) any ideas?