OK. So I'm getting back into playing bass ofter a 25 year lay-off. It's coming along quite nicely, too. But I've watched these guys with flailing fingers and thumbs getting the most amazing sounds. Now, I've no real thoughts of playing slap but I'd really like to give a little go. You know, just to have a shot at it. But I can't even get the merest hint of anything musical to crawl from the speakers. Just where does one start with this slap business? HELP.....!!!