AH, that was something i totally understood wrong. Thinner is better? that changes my new design plans a lot. Im headed towards napa right now, its heatercore time. After that it will be off to pestmart.com
to get a pump
Heres some crappy text trying to describe my other plan...
--- top plate
~~~ solder
=== middle milled passageway plate
~~~ solder
--- bottom plate
so the top and bottom are identical and the middle plate is milled, or drilled or whatever to allow the water to pass through
sorry, its hard to be descriptive.. ill try a better pic later