Theres nothing particularly objectionable about this to me  however how rough is the equivalence  It seems to me that even on a Septuagintcentric view of the Old Testament it matters that one believes the Septuagint is the Old Testament of Christianity when there is a difference on some point and only then IMO  In those cases it can be pointed out as emphatically as one would like that the Old Testament of Jesus and of the Apostles was the Greek Septuagint and the reason that matters in this case is because the Septuagint was translated to say yadayada whereas the Hebrew version is more ambiguous