"Oleg Lego" wrote in message
...
I am considering messing with one or two of the holes I drilled,
perhaps enlarging the appropriate holes to try to swing the centre
into alignment, or perhaps drilling another set of holes after
rotating the router a bit.


Pretty much standard installation to have oversize holes and pan-head screws
to allow centering in the counterbores. I wouldn't be ashamed of such an
installation.

Unless you're working with machine tools of some sort, the kind of accuracy
that will allow the taper of a screw head to draw the thing centered seems
a trial and accidental success adventure.