OnDaEdg's copper pipe article
 

Nice work. This would have been a god-send to me last fall when I first started working with copper pipe.

I agree that copper is awesome for strength and leak proofing, however I one comment. You probably shouldn't use copper for a pump as the vibration will continually rattle the rigid pipe and everything that its connected to. This is one area flexible tube is better.

Anyway I look forward to the next two parts. I've always wondered how well an all or mostly copper system would work.

you can use copper piping on a pump, just isolate it with a small length (a couple inches will do) or soft tubing, such as silicone. thats what Turbokeu did.