There's been alot of experimentation with magnet swapping by some Seymour Duncan forum members and following various threads helped me work up the nerve to dismantle my pickup and give it a try. BTW, it's really a pretty simple mod. Took more time slackening the strings and removing my pickguard and pickup than swapping out the magnet. I got a set of '59's as part of a trade deal a few months back and haven't been totally enamored with the bridge pickup. Too trebly/thin an high notes and too scooped for my tastes. I was given some advice to put an unoriented, rough A5 magnet in it as a way to round out the highs and add some mids. I was a little skeptical but figured it'd be worth it to spend a couple of bucks and hopefully get what I wanted out of the pickup. The UOA5 was just as described - less sharp highs and some added mids. I have some standard riffs I play when setting my tone and the difference with the new magnet is unmistakeable.