I have been mainly a jazz-style player, with my head stuck in the 1950s, but using modern fretted and fretless basses. Now, at the age of 50 something I'm inspired to give slap and pop a serious try....I have what seems to be an excellent book by Chris Kringel (published by Hal Leonard) and have progressed in a short time to playing Higher Ground....Slap seemed easy, sometimes I just bounced the thumb, sometimes letting it drop to the next string, which gve me some security, and gave a good sound....Pop seems very difficult for me. I can do it OK, but it is very painful for my slightly arthritic hand. I ended up using masking tape on my index finger, three or four layers of it, and then it was fine....I also noticed the knuckles of my other fingers banging off the edge of the pick guard - it is a jazz bass without any shaping of the body. I imagine it would be better play slap and pop on an instrument where the body is cut away, or shaped so that this doesn't happen. Is this what is referred to as a 'thumb' bass?....Anyway, I really enjoyed it, but there is a long way to go. I have no problem wearing tape, as I've seen Mark King use it....Just though I'd share my experience, and apologise for this being all in one paragraph - my fault for indulging in an iPad.