I have a Gotoh 201 bridge on my J. It is a medium weight, die-cast bridge made of some type of zinc alloy, I guess. For grins, I tried a lightweight, bent-plate vintage style bridge on my guitar (same hole spacing, so no big deal). Yikes, an immediate loss in tone! The dead spots that were just barely there with the Gotoh just jumped out and there was an overall "smearing" of the notes. The amount of punch decreased and the low E string was just barely there. Needless to say, it only lasted about 15 minutes on my bass. This got me thinking about what a huge impact the bridge can have on the tone of a bass. Any of you players out there experimented with various bridges? Brass v.s. aluminum, heavy v.s. light, and particularly the ABM single-style bridges with lockable saddles and the Hipshot type B. Is the Badass II made of brass or die-cast? I have read someplace that a heavy bass does well with aluminum and a light bass does well with brass, but this seems overly simplistic.