I was playing that Tony Franklin again. My teacher really discouraged unlined fretless, but I am confident that I could be competent on an unlined fretless if I bought one. Once I thought about some more, I really thought why am I worried about lined or unlined fingerboards? Fretless depends on a good ear and muscle memory whether a bass has lines or not. I just need to practice on the basses I own already. I do not want to fall into the trap I was in when I was young of worrying about a 24 fret bass instead of buckling down and learning the fretboard and theory. That Tony Franklin is sweet, but someone else can have it.