Agree the market is dour today and agree that grades are all important. However, I think your estimation of grades is off the mark. Have a read of the scoping study report on stage 1...grades are in the same ball park as SFR. PB may well get there as well. AVB aren't drilling for an alternative source in the west, they are looking for additional sources, ie stage 3. They have said as much in their ASX releases.
cheers
AVB Price at posting:
7.4¢ Sentiment: Buy Disclosure: Held