I bought my Blacktop JM secondhand. The original owner had replaced the neck with that of a Squier Vintage Modified Jazzmaster, which is a very nice, smooth neck, and also has the vintage finish. They also replaced the bridge humbucker with an aftermarket Seymour Duncan pickup, so it's a little hotter. But I love the tones I get out of this thing. The bridge pickup is bright and chimey (like Nels Cline or Mike Daly), and the neck pickup has that great, fat Fender single-coil tone like Thurston Moore is jumping out of my guitar. The tremolo is very smooth, and I love it soooo much more than the one on my American Standard Strat.
If I were to make any change to it, it would probably be to replace the vintage-mint pickguard with tortoiseshell. But otherwise, this is a really great guitar.
actually i wanna use double humbucker pickup like gibson's pickup, but i dont have money to buy it. then i tried to explore my sound use my first second guitar, yeah that is jazzmaster blacktop mexico.