Mugwump,
Great information. I've been studying the pdf with the parts list for the pump.
First, looks like your guy is building a tandem or dual pump.
The parts diagrams got me thinking. One could have a couple kinds of pump kits to work from.
Of course the full kit would have everything but the water.
The next kit would be bare bones with only the parts that would be hardest to get and the rest would be found as common material in the country it was being built in.
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