After playing straightforward 70's rock for years the band wants to put a few funky tunes in the set and they want it a bit ... slappy. I've never needed to learn to slap but now it's imperative. The right hand techniques I can work out but it's the amp settings I'm struggling with, help me. Do I ramp up the gain to get something out of my thumb strikes? Treble and mids at 11? Do I hit it harder, or not so hard? I just can't work out that sound (as a relatively new player). It's not really the super-percussive sound, more the disco accents I'm after (original songs). Using a Sadowsky Metro UV60, Mesa D800 into a Subway 15". No effects. Help!