> It's the tools/DRC/restring specifications. There is a situation when
> changing the drill diameters in brd are very important, assuming you
plan
> production and first time you need to create a homebrew pcb and then
> production. This means you need two different libraries, because for
> homebrew board the drill diameter it's really small and used just for
> drill steerage but for production the drill must be the real one.

I don't understand.  Whether homebrew or not, the pins must still fit into
the holes.  Also, if you are drilling the holes yourself, you can use any
drill bit you like.  The DRD and DRL files wouldn't be any use unless
you've got your own NC drilling machine.


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