Eric Chan is basically linearizing the ABW response of the three black and grey inks, and I believe these three inks are the same for the 3880 as the 3800, so the only thing that might go out a bit is if any of the new color inks are involved in the toning. Otherwise, it should work fine. If you have a spectrometer like the i1 or Datacolor spectrocolorimeter, you can use Quad Tone Rip's linearization method to do your own black and white profiles, too. Or, you can use Eric's older method to create your own correction curves. There is a link on Eric's site to that method. It's a little math intensive, but I've done it and it works very well.
Aloha,
Aaron