[Clascomment] OPT-IN: Demonstration of a novel technique to measure two-photon exchange effects in elastic e(+/-)p scattering

[Enzo DeSanctis]

The paper is clear and well written. 
I suggest the following minor corrections (my locator is: page/column/paragraph/line:

3/r/2/last-line: drop one of the ‘up’

6/fig.3: I would move the writing ‘to tagger dump’ at the end of the beam arrow

10/r/last/4-6: I would use the same values of epsilon and R given in Tab. II and however with the same number of digits.

11/TableII-Caption/3: ‘R’--> ‘R_2gamma

12/l/1/last-line: I would change ‘in 2013’ with ‘soon’, to avoid the risk that the referees ask for a more complete paper with the full analysis.

12/r/ref.[25]: --> ‘SAMPLE Collaboration’