I see no problem with the blue spiral disruptor emitter/deflector, since the Galor I believe had a blue one initially. Assuming that the Damar was commissioned around the same time as the initial Galor run, I see it possible that perhaps later runs got yellow ones, while initial runs were later refit to carry a more advanced emitter, assuming that yellow emitters=more advanced.
Well i'll be damned. So it did have a blue one. My bad.