[Clascomment] OPT-IN:Alignment of the CLAS12 central hybrid tracker with a Kalman Filter

[Volker Burkert]

This is an important paper and should be presented as such. I have no comments on the content but only on style.

1) Line 12 and line 19: Avoid defining acronyms, such as CVT or CLAS12 CVT, in the abstract. 

2) Define acronyms, like CVT, the first time they appear in the main text (line 32), and use them from thereon without redefining them. This relates to  Line 101, 105, 109, fig. 1 caption, 428, 673, 684, 692, 866.  

3) Line 702: Replace CLAS12 Collaboration --> CLAS collaboration. 

4) Figure 8 to 22 are all labeled as "PRELIMINARY" . A journal will not accept that. Figures have to be final when submitted to the journal. 

5) Some figures (Fig. 20. 21) have to too much bold-faced description in the graph itself. It is better to put the description in the caption and identify the different panels by characters a, b, c .... or numbers 1, 2, 3 ... 

That's it,

Good luck! 
Volker