I have seen this from Radions, but it was more pronounced in shallower systems. If you have separate diodes you'll have some degree of disco. If you really can't stand it, you could return the Radions and get 3 Kessil A350/360 and pocket the difference (or get 4).
EDIT: side note, I wonder if anyone has modded frosted lenses onto a Radion, seeing as the inclusion of frosted lenses in the AI Hydra significantly reduced the disco found in the Vegas...