Just make sure you position the HDMI jack in the panel so it won’t interfere with the HDMI output from Hypno.
Assembled panel + FPV HDMI cable:
I ended up rotating the panel HDMI jack 180 degrees, because my right angle HDMI extension cable was an up-angle, not down-angle. It’s probably good to build this in such a way that allows the user to rotate the connector in the panel, in case they want to use an angled cable.
If I were to do it all again, I might try looking a bit harder for a micro-HDMI panel jack (I couldn’t find any), along with a micro-HDMI extension cable so that it doesn’t interfere with the knob quite so much. But what I have works fine for me!
Not sure what the strength would be for a 3d-printed panel, since the HDMI connector requires a fair amount of force to plug/unplug, but CNC routing an aluminum panel / pcb would probably be pretty easy and not too pricey if you did a decent sized-batch.
Here’s another option- I’ve been using HDMI bulkheads mounted to the side of my cases. Works great on wooden cases like Monorocket and Goike stuff, and doesn’t use up any HP or get in the way of patching.
The holesaw that I have for my drill makes holes that are a bit too big, so I add several wraps of electrical tape on the bulkhead before cramming it in there. I haven’t been able to find bulkheads that use smaller than standard HDMI connectors, so I still need adapters inside the case.
 Standard precautions apply. When you aren’t using the USB or HDMI cables, make sure to keep the ends covered so they don’t flop around and wind up short-circuiting something inside your case. I cover the ends of the cables with several layers of heavy-duty plastic bags, held in place with rubber bands or tape.
All the options seem great, but since I have empty rack space I’ll probably just use a right angle cable for the moment. But eventually modding a composite sync in/out and hdmi out to my mantis case would be supreme for saving hp when the thing is full.
Is there, or are there any plans for eurorack expander that makes the side HDMI output accessible when the Hypnoses is mounted in a eurorack case? I would imagine that someone could make something in 4hp that would do the trick.