I tend to agree with JessM as to get any flavour into the stock it needs to be reduced alot for it to taste of anything. A slow cook pot or Aga would do a good job without wasting too much fuel.
Cooked bones, as in from a roast chicken, don't give off as much flavour as raw ones do.
Powerful Stick Vacuum - recommendations please

! My DH is another who buys expensive cookery books and follows the recipes exactly. He's never happy with the result and when he wants that thing again, he asks me to do it because my method of getting a rough idea of what's going on from the book, and then substituting, making do, ignoring and changing, doing it all in a fraction of the time, and clearing up afterwards, is usually more successful. I guess it's down to practice, as usual with anything requiring skill.

