I use a dremel with a #80 bit for all of my vias. However, I also built
my own drill press that does a pretty good job of keeping it straight up
and down. The runout is around 6 mil or so, so on a 13 mil drill bit
this is 50% of the drill's diameter!
my own drill press that does a pretty good job of keeping it straight up
and down. The runout is around 6 mil or so, so on a 13 mil drill bit
this is 50% of the drill's diameter!