Easy to fix. Buy a marker - the fancy paint ink type, like white or whatever color you want, and put dots at the right places.That would be a concern. I could work around it, but I would prefer not to.
Ok, maybe not easy... gotta find those notes... at least octave and 2 octave (what is that, fret 5?) are accurate to find by pitch that way.
Seriously, I just want to know if I can do it.