Homebrew PCBs

I've used de-stranded speaker wire up until now.  If you can find a 7x28 
wire, that would be great, but 7x30 (or 7x31) is loose in a 13.5 mil 
hole, so it moves around a lot due to surface tension from the solder. 
That's why I was looking for something that would be a tighter fit in a 
13.5 mil hole.

I suppose one could buy a smaller drill to fit the destranded speaker 
wire :-)