Sorry, dude - That was sort of a joke, but based in truth.
Long story short...
I was presented with a tape once - 1/2" 16 track Fostex 15-IPS, DBX.
The band recorded onto the first 10 or so tracks. The DAT at the studio failed or something and had no analog mixdown deck. So, not to waste a good mixing day, they sent the stereo buss to 13 & 14.
Hence, for mastering I needed a deck of the same model (I never realized how many different 16 track decks Fostex made... DBX, no DBX, HX, S, C, 15IPS, 30IPS - They really had a good selection!).
That was a strange one... Of course, the moral of the story is, Lend Unto Others as you would have them Lend Unto You. And of course, return the gear in at least as good, if not better condition than when you got it. Deoxidize knobs, jacks, take the grime off the knobs, clean the heads (if you're borrowing a deck).
John