oscilloscope?

[sak-rwsd]

Maybe it could be a paid addition, to make it worth the time (and given that it would be a completely different beast)!  I would happily pay $10 or something fair and reasonable for it?  (I also realize, as a parent who frequently turns down full-paying potential patients in my psychoanalysis practice for this very reason; that - after a saturation point - some things, such as time with family, are priceless!)