i played around a bit on some muting techniques and i came up with something that i thought would help clean up my sweeping. i tried sweeping without palm muting, just fretting (well, not really) the string just above the desired fret but not letting it touch the frets, kinda like a harmonics thing. it sounded like **** on an acoustic guitar but was pretty decent on heavy distortion. i still dunno if this is the proper way to sweep?