I doubt it, without lines. Played fretless professionally for decades. I can't make the jump accurately if I can't feel or see where I'm jumping to without hearing the note first. And tapping the string to hear it is the only way, and everyone can hear it, not just me.Give it time, and you'll get razor sharp accurate!
But... thanks for the vote of confidence... I AM trying to get so good that I can jump anywhere on the neck and nail a note without anything to feel and guide me... practice makes ... well, pretty good