I definitely don't have two set screws stacked on top of each other in the small hole behind the trigger.
How does the screw in the trigger hold the trigger rod in the trigger. I just seems like a stop screw, like on an Ego. Is it diagonal, or horizontal? Because the diagram I found for a Nova 700 shows it going in to the screw diagonally, but the one on my SuperNova is horizontal. I can screw the set screw through the trigger if I were to pull the trigger out.