Yep, need a few extras. Still my calculation went like this:
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2x 12pf caps 0.08
100pf cap 0.006
So as always there's a trade off to be made, some extra board space (not an issue compared to the footprint of of a battery) and some solder joints too. I wonder if the same sort of things were discussed by the foundation when trying to save pennies here and there to keep the cost of the Pi down
Obviously slightly different for me as well, everything apart from the chip was already available and I'll only ever be building a handful of them.