Model based on concept art provided by the amazing @miraityuuou:
https://twitter.com/miraityuuou/status/1107998081713225729?s=19
A lensing machine to focus gravity energy into black holes makes this a iconic gadget that is just waiting to be realized in a fun Sci-Fi adventure. Whether it be used for creating ad-hoc portals, singularities, or blink events, this would be interesting to incorporate into a future project. :D