I am planing a fretless build and have been thinking about a few things. The body will be walnut, and the neck be qs cherry, so i am wanting an affordable wood that contrasts well with them. My top 3 considerations are bloodwood, purpleheart and bocote. I am wondering how each of them differ from each other. What is best with roundwounds? How do each sound or behave different? I will also be making a 2 piece non-adjustable wooden bridge out of the same wood as the fingerboard. Any tips on this? I also was planing a zero fret, but one thing that has caught my curiousity, is a slap fret at the end of the fingerboard. All i have heard is the idea of a slap fret, but never any images or sound clips. Any tips on how to make one? Should the top of the fret be level with the top of the fb, or slightly higher/lower? Should it be over the location of a fret, or does that matter?