Be very, very suprised to find that Andy C was doing that.

John B does it though, and then spends all the time he would have otherwise spent in the mix "working on other aspects of his performance" - read doing his nails, chatting up girls and signing autographs.

I reckon if it frees up your time to do more interesting things then its a goer.
Not sure if I'm not too lazy to bother though. Still haven't really managed to digitise my vinyl, let alone pre-beat match it.

What would be the easiest way to change a wav's tempo? Ableton always seems to go out after a while, no matter how tight I try and set it.