Hi Roger,
Spectra can only rule out or support the microlensing hypothesis, not confirm it. (Any changes in the spectrum would have indicated a potential alternative cause of the brightness change) but yes I am happy for my spectra to be included in a paper/article for the JBAA and I can supply a paragraph of explanation. (I will leave it to others to judge its merit as I have little knowledge of the subject)
Cheers
Robin