Vortex Sound Research

So I remember people being excited for a re-release of a rare dual slew limiter. I think it was made by Serge, and it was in eurorack format. Not that it helps, but it's grey(not that it helps) and a lot of the design philosophy revolved around the dual/feedback patching for fun modulation.

I remember watching a YouTube video on it so it's not totally obscure.

Thank you in advance!