woah, don't take it as a given that it's not going to happen as there is no denying the laws of Physics / Chemistry about corrosion.... :D Just thought I'd say that before you blame me if anything goes wrong.
But yes I have had this set up for 2 years and no corrosion issues.
I have an alu res (not anodized) and a copper CPU block and an Alu Rad, never had any galvanic corrosion at all in the 24 months it been set up and I've never once changed my fluid plainly due to lazyness. I guess I'm just lucky :)
Just thought I'd chuck that in there.
OK Tubing wise if...