i've seen variations of that, but i've never tried it. TBH, my POV is based on a lifetime of unlined, side-dots-only playing. anything else temporarily confuses me when i look at it, but that's me.I've also done basses with full or partial white lines and the side dots right on the ends of the lines at 1, 3, 5 etc., like you are suggesting. That works well by itself, if that's your main bass, and you aren't switching frequently to fretted basses.