When I took the iron out of the guide and checked it it was perfectly flat across after using the 1000 stone. Then I went back and did the cambering, using 15 strokes on the two outsides, then 10 in the two middles, then 5 in the center. I did this on the 1000 and then the 8000. Then I checked the cutting edge against the machinist square. It wasn't square anymore, but I couldn't really see much of a camber either, which leads me to the next thought...
It all comes down to how much camber you are trying to create. The amount of camber should be in relation to the thickness of shaving one wants to achieve.
If you want to take final smoother shavings of ~0.001", there is no need to have a total camber of 0.01" out to the edge. That would be more in line with a try/scrub plane taking a shaving in the 0.005 - 0.008" range.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)