Don't get me wrong, I love Mark King and the way he plays bass being it slap or fingerstyle (where he's a true master, remember that he's a Jaco fan and Level 42 was originally intended to be a fusion band without any songs, but titles or tunes if you prefer, as there were no lyrics).
To me the best bass for slap has always been the Jazz Bass, but his signature model seems to have all wrong.
Some instruments are a disaster and this is one.