Ha!!! I,ve got bad eyes, short-sighted. I'm too self-concious to wear glasses at gigs, stoopid pride, and since moshing and sweating isn't good on them. So, I have trouble seeing the fretmarkers, small dots in flashing blue stage lighting, and smoke, also the pedalboard settings are unseeable. I went and bought a tin of poisonless, glow-in-the-dark-paint! Dropped a bit on the side-neck fretmarkers of my bass, now I can see them no matter how dark it gets!!! Also put some in the tactical knobs and switches of my pedalboard, I cant wait to test those out in a gig next wednesday. ..See how it works. I've had a piece of adhesive sandpaper at the 5th fret before so I could feel it with my thumb when I was at that fret, but sweating always dissolved the adhesive in the middle of the gig. ...The lenghts I have gone..