When I play a six or seven string, my technique stays exactly the same. My muting is good and works no matter how many strings are on the bass. So again, I say for me it doesn't matter how many strings I have, I will still sound like me. In fact, my hands are pretty big and multi-string instruments actually may be easier to play for me. i haven't played a 4 string in so long I can't remember if it was hard or not!