Yeah, those kind of block inlays are very unusual for a fretless, but I don't see any lines. And sure, all of my unlined boards have side markers. At 1, 3, 5, 7, 9, 12, 15...etc. But so does every fretted bass. Thing is, Lagado is quite adamant in his belief that you must have lines in order to play in tune. Then he posts a video of a guy playing without lines.