I keep selfishly watching this thread hoping for an answer. I'll be doing the Vanos on mine in the next few weeks and the uncertainly here just give me another thing to be irrationally terrified of.
Hope you get it sorted Salty!
(edit) Did you find any DIY particularly helpful for INPA? I have it on my laptop but I haven't seemed to find much documentation surrounding it, or I'm just looking in the wrong places.