Well one difference I noticed about the 1.8T from my old 12v is that no, it isn't. I noticed the 1.8T has a lot more hard lines, and many of them are considerably larger than the regular 2.5mm vac tubing. I can only assume thats to compensate for teh boost.

As for the rest of them, I'd say just double check that all yer hose clamps are tight. I think those ones have to be bought individually, but i can't imagine you're gonna have to replace them all that often, if ever.