I'm so obsessive that I used to try to get my mixes to end within a few seconds of the tape running out. Was harder than you might think because the tapes weren't exactly as long as they claimed to be. Jeez what a time sink. You had to record mixes in real time too IIRC. Wouldn't dare pause for fear of an audible dropout in the result. CD mixes were a whole lot easier, as well as more stable and better-sounding.