gEDA-user: home-made 4 layer board idea

[DJ Delorie]

The biggest problem with home-made boards is the vias, right?  What if
you drilled the outer panels with larger holes, so that you could
solder to the inner layers?  You wouldn't even need copper on the
unused outer layer, you could just drill it out.

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Plus the usual problem of obtaining the thin outer clads, and precise
enough drilling.