Exact-a-mondo, Jim...you learned to use the leakage and other garbage and accept that as something critical to your overall "sound".

Sam Phillips of Sun Records fame always used to get ripped on by local Memphis DJs for having 60-hertz hum on his records. But if you're cutting tracks from the likes of Johnny Cash, Carl Perkins, Jerry Lee Lewis, and of course Elvis, you don't change the overall sound because clearly, it works. Plus, the very first mixing work I did back in Nastyville was on a now-coveted Audiotronics 16/8/2 desk that cross-channel leaked like a mo'fo. People into the vintage thing, however, have made those original desks into something of a spendy "cult" item. With leakage.