Is it possible to take off some windings from an existing pickup?

[rockinstephen]

Here's the situation: My ES 330 sports two P90 which are mounted with dog-ear covers – not height adjustable. The neck pickup is considerably louder than the bridge pickup and IMHO it could use some more treble and clarity. It is good, but it could be a little better in my opinion. A friend of mine put Lollar pickups in his 330 for that reason.
Now I'm thinking that the pickup may be just a little bit overwound, taking of some winds may get the desired tones. I wouldn't do it myself, but I'm asking you good guys: Is it possible to just take off some windings?

Your best bet would probably be a new set of pickups. You might end up with a "one of a kind" custom guitar...

 

[Golem]

Lower wind P90s are my favorites. Yes you can do it. Someone pointed out there's more to under wound pickups than just taking off windings. While true, it would still likely get you what want.