Homebrew PCBs

With all the talk about using inkjet printing I started doing more
research to understand the construction. I found a couple of sites
that show lab built microdispensers.

<http://www.phy.mtu.edu/seniorarch/jpvopal/>
<http://www.slac.stanford.edu/exp/mps/FCS/FCS_drop.htm>

I did find some references to other lab designs, but these are the two
I had book marked.

The above designs would have the advanage of being able to fix if it
clogged or doing more elaborate things like wax printing.