Great, see how you get on! You may find you need to try it for several days before deciding whether or not it works - also at his age you would expect to have one night feed so you may find he starts waking up hungry at 3am - in which case he should go back to sleep quite easily once he's been fed.
the only other thing looking at your routine is that you might want to rule out overtiredness - his last A time is quite long after only a short nap - have you tried putting him into bed a bit earlier, eg 7pm?
Bryony