Dear Steve,

It is a pleasure to see you stand firm to defend the text where
you think it is OK and change it only in a way you consider best.

I keep bothering you with a few remarks.

  Best regards, Tjeerd

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Title:
Leave only "decays" plural, the other words "singular".

SB: Title is already reworded to
"First observations of the decays $\bstodskpipi$ and $\btodskpipi$"

TK: "First observation of the decays" would be better.
===================================================================
Give a correct value for "high". Introduce the variable pT here.

SB: Exact values will not be very meaningful to anyone outside LHCb, 
so I don't want to bother the reader with such information.

TK: Nevertheless you give 20 mu. Which is a value that is only valid
for a certain pT.
===================================================================
Line 92:
What do you mean with vertex constraint? PV?
You should cite DecayTreeFitter here, if that's what you use.

SB: Happy to, if there a published reference? 
This is highly irregular in terms of LHCb publications.

TK: Maybe Patrick can help you with a reference.
===================================================================
Line 118-120:
This sentence is not well understood.

SB: This has been reworded in the new version based on other comments... 
It now reads:
"A common, freely varying scale factor multiplies the width parameters 
in the CB and Gaussian functions to account for slightly worse resolution 
in data than simulation."

TK: Add "in" before simulation as well.
===================================================================
Figures 4, 5, and 6:
- Add "LHCb preliminary" in the plots.

SB: As this is going directly to paper, I see no need.

TK: "Preliminary" is my mistake, made after reviewing a CONF note.
The original comment was: add "LHCb".
===================================================================
Line 200:
Remove "therefore".
SB: I think it sounds awkward without it, I leave it as is.

TK: "Therefore" seems to refer to the unclear conclusion about the
variation of the background shape, not to the value of 6.6 defined
in the sentence before that.
===================================================================
Lines 311 and 315:
Refs [3] and [4] have too large spacing after the title.

SB: I don't control the spacing. This is generated by the standard LHCb.bst.

TK: Maybe Patrick knows the solution to this.
===================================================================