Tips to dry out PC water cooling loop?

I am setting up a loop on a new build with Primochill Vue. I've been running the Sysprep for a week with no leaks. Now I have to completely dry out the loop to put in the Vue. Most of the loop is now drained. Anybody have some tips on how to thoroughly dry it out?

hair dryer, or put sections on the radiator

not a good idea at all, NOT AT ALL if your DIY Loop consists of copper.

As soon as your raw copper meets oxygen your disaster starts to take place.

You should not leave those parts "under air" for too long, best is too keep them as oxygen free as possible ( = old water, like in a heating, new water harms your loop, that's a fact among copper heating guys and car mechanics, so I got told ).

I would take a Y-piece and a drain valve and flood it with whatever you want, drain until all the new liquid is what you want. May need some more of that "Vue" stuff but safer for your copper ;)