Homebrew PCBs

>
> That sounds pretty good; fast and easy.
>
> I am laying out some two-sided boards, at the moment. I would like to use
> 2x20 pin headers, with some surplus (new) IDE cables that I got (200
> of them, new, for $5!), to make board-to-board connections.
>
> One problem is that the headers sit flat on the board. So in order to
> connect them to both sides, it seems like I'll have to put another row
> of holes next to each side, and solder on both sides of those holes.

You can solder the 2-row headers top side.
Just keep 2mm distance between the board and the molded plastic and hold
the iron relatively flat against the board when soldering.
Done it, worked without a bad connection (~100pins).
You could get longer headers if you like (e.g. wire-wrap version) but it  
works
with the standard ones too.

ST