I am planning on going the Motogadget route also on my build. Simplifies things greatly...not that I am in anyway electrically minded, although perversely I do enjoy the soldering, snipping and heat wrap!
Is Tygon immune to moisture absorption? I was going with the HRC style...in light of Yan's issue I might have to reconsider.You weren't kidding about the tube having issues. Investing in the Tygon one myself pretty soon.
Hell of a build!