Homebrew PCBs

Chris Kleeschulte wrote: 
> I wondering about the via creation in Eagle. What size hole is good
> to use for this procedure?

The drill size depends more on everything else than on spindle, easy
answer: make a board with a bunch of vias for testing and count success
rate per drill size.
You mention eagle, it can make annular ring for vias troublesome when
doing via tending with dry film, there is a trick for easy changing this
on eagle:
http://gaussmarkov.net/eagle/padsize.html

  
> James Mitchell's plated-thru hole method 
> 

Is that method the one using car radiator repair liquid which is
conductive, with the same procedure as think&tinker use conductive ink?
There is a guy who makes it with a cheaper homegrown ink:
http://www.youtube.com/watch?v=KTNuTv_IQp4

Simao