I'm thinking of putting a 70's fretless maple neck on my 54 modded P-Bass with a P/J setup. I love a sound with strong bottom and highs for occasional slapping, and play through several old tube amps. I want to expand musically and appreciate the fretless sound. What will my first concerns be to adapt? Can I still use roundwounds? What will I lose, what will I gain? Thanks for your help!