Quick update from my side.
Just built my prototype. Ordered black PCBs that look gorgeous. Laser cut a case using @infovore’s template in black acrylic (for the bottom) and frosted clear (for the top). Black nylon M2 screws and standoffs did the trick holding it together. Did reflow on the SMD components using a laser-cut stencil. 3D printed fader caps fit perfectly and really work for me.
Did I also mention that it looks gorgeous? I may have - but you may not have believed me. Here is some proof:
Check it out next to its new friend:
Want shots from the build to make sure it is beautiful on the inside too? Ok.
The lovely PCB that @infovore put together:
Laser cut stencil for solder paste application:
All parts on board:
On the firmware side, i2c is working. I’ve a couple of tweaks to make due to differences between the modded version I made a year ago and this vastly expanded version. I’m also planning on adding in an alternate firmware that allows the 16n to run without the Teletype but still broadcast i2c to multiple Ansible/TXo modules or a single ER-301. Hoping to get that in the hopper shortly.
FINALLY…a little OT, but not totally.
I’ve put together a little 2HP i2c module I’m calling the TXb. It is a powered bus board (if you plug it in) that has six 2x3 headers on the back and 2 x 3.5mm stereo jacks on the front. This allows for easy i2c connection of the 16n into your rack and also makes bridging rows/cases easy as well.
Runs will need to be very short and it is not likely you will be able to chain more than a couple together (important to only power one), but with all of the i2c modules that are popping up and the external 16n - the TXb will be handy if you want to keep everything neat and tidy … like this:
All I have left to do is clean up the silkscreen on the boards, order TELEX-matching panels for it, and do the final pricing. When I’m ready, I’ll start a separate thread where you can express interest. 
