Hi, I'm a bit puzzled by your comment in the Nature write up that mentioned "systematic errors in one or both experiments". What conflict could be resolved through a systematic error in WMAP? Planck have claimed that WMAP and Planck temperature power spectra are consistent over the range of scales accessible to both. If that's true the difference in, for instance, best-fit parameters between WMAP and Planck could not be due to a WMAP systematic. Perhaps I have misunderstood what you meant?