You can play slide all the way up the string until you slide past the pick-up you are using, ie.. use the neck p/u slide past it and the sound just dies off, use the bridge p/u and you just keep going, the notes are extremely close together up that high, as far as 32 fret guitars go, a slide is really nothing but a moveable fret that you can use from the nut to the bridge, I wonder how many notes that could be on one string? 60? 70?, hmmm, deep thoughts to ponder!