I wired a .0047uF cap across the already-wired terminals of the 5th knob on my modern 360/12. This has no effect when it's full CCW, but as you turn it up it rolls off the bass response for the neck PUP. Full CW it starts sounding kind of Straty. Not really a lead-type tone, but great for rhythm parts. You can use the volume controls for blending the Dual-PUP sound instead of the 5th knob. You should also try running it thru a MXR Dynacomp with the knobs around 2-3 & 9-10 o'clock. That takes off some of the bottom end and adds some brightness to the sound. That's one reason why folks like Dynacomps as opposed to other compressors that don't color the sound.
FWIW, for some reason my 360/12 came from the factory with 500K tone pots which make it somewhat brighter. Maybe they were running low that day, but I sure don't mind
