Hello friends! This is my first post and I'm building a Warmoth Strat and I'm installing my VN p/u and I'm not sure how to decipher which one is my neck and middle.. My bridge has a Yellow/White and the other two are Blk/Wht.

They are identical pickups. Use whatever in the middle position and the other back/white in the neck position.

They are humbuckers to theres no magnet polarity difference across the three pickups. No RWRP middle.

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No no and no

Here's a picture of my Deluxe Players Strat before I changed the pots and caps. In my case the Mexican Factory put the yellow one in the bridge position. When I did this I looked everywhere to see if there was a difference, couldn't find anything anywhere. I'm 80% sure there's no difference. I think that's part of the vintage sound, they didn't consider Neck/Bridge/Middle when they made Leo was first making guitars and winding pickups.

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"Persistence Is The Father Of Invention"
-Crazy Old Man In Training

Thank you so much! What do you think of the "treble bleed mod"..? I've been to to avoid it. Whats the consensus?

My opinion is to avoid it at all costs. Particularly with those pickups, that can be thin sounding at times.
I find it zero's the bass response to make it seem like the treble has stayed in the mix. Not really what you want with a Marshall where the high mids are sky high. If anything, I'd be looking at ways to round the bass response out with that pickup set. Something I couldn't do with mine. So I put a Clapton mid boost circuit on em, which really made em usable and prime for Marshall goodness.

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No no and no