I've got one thing to add,...

When using peep sights, isn't it more natural to centre the pin in the peep? That the whole principle of the accuracy of peep sight in target rifles.
So when I shoot, I centre the pin in the peep.

Many others will centre the sight housing in the peep, and the aim with the appropriate pin. I can't seem to do/comprehend this, as when I focus on the pin, amd go 'natural' it centres itself in the houseing.