Hi evb149,
Thank you very much for this very precise and detailed answer.
hey hey, I found the 0.711 mm & 0.914 mm drill bits from your wikipedia links
Again, thank you very much for your time.
I am already reading the information on the links you indicated.
As per the pdf drawing they suggest simply 1 mm holes.
In the case of my first PCB, hole sizes are not critical, I just wanted to use hole sizes that make sense.
Kind regards