Larcher, apparently many years ago, people used to make a small hole(s) in the end of an egg and suck out the raw contents. We don't do this now, but maybe our (great, great?)grandmothers did. Therefore, to 'teach your grandmother to suck eggs' means telling someone how to do something who probably knows how to do it better than we do.

Those safaribwana pics look OK but the targets seem rather large. While any shots within the red spots would work eventually, Kevin Robertson seems to believe in a bit more precision.

Cheers
- Paul