Hello folks, I have taken up the edition of section 3.5 (Data/MC validation) and chapter 6 (systematics and cross checks). Here are my suggested changes: section 3.5) a part from updating the existing plots I would update the current comments (for istance dropping the one about the missing orphans) and : 0) comment on which are the disagreements that actually scare us 1) add cocktail-generic comparison 2) discuss impact of track smearing and neutral smearing/killing 3) discuss the reweighting and the fact that we will use it only asa cross check 4) Mmiss: discuss Daniele's studies (charged vs neutral, kaons vs ks) chapter 6) rereading the status of the section (that has eveolved from my first version) I agree that it is naturally drifting towards an hybrid which I do not like either. So I would suggest the following structure: - one introduction which maps the pieces in the formula with the "analysis aspects" [such as Mu depends exclusively on the mes fit and therefore it is affected by the systematics on it ..." - a set of subsections on the specific issues (Pid, tracking, Breco etc etc ...) after receiving feedback I will start implementing this bye ric