Voted 10 for the rarity factor and it's not another Empy.
Also, quick question, do you find you get a higher HQ rate after thwacking till straighter silhouette? Honest question.
I did the thwacking until the message on both attempts. It's kind of a hard thing to test with the randomness of the tatter synths cause they are so easy to HQ and yet getting perfect alignment will still net you an NQ.
It's just one of those rumoured techniques where some believe and some don't. I believe it's in the game for some reason, what it is, could be for the HQ or not. Regardless, the Silhouette msg is rare in itself, and pushing for it runs the risk of a leak and ruining the synth for you to try again.