I started searching for a different way to monitor some vitals on the 16. The Edge CTS is kind of large in that drivers corner on the windshield, and the CTS2 is even bigger. I considered a ProClip, moving the Edge to the right side, but wire routing and hiding it would be difficult. A Google search found a vendor on Etsy that listed a vent mount for the 16. I ordered one up, and was impressed with the quality. The vendor uses a 3d printer to turn out this mount, and that got me to thinking that if he could do a flat, straight on mount, what were the chances of creating something in space that tilted the gauge toward the driver for easy view?
I reached out to Kyle, the guy at 3dspecialtyUS and asked.
Apparently, no problem for this gentleman to 3d design and print some pretty cool stuff. He had a design whipped up, and printed a vent mount that tilted the gauge about 20 degrees toward one side, so if installed in the left hand AC vent, it should be spot on for viewing. The guy was super cool, an enthusiast, and a tool maker by trade, so he has an eye for accuracy.
The original flat mount I was sent accepts a 52mm Banks iDash1.8 perfectly. That's what I'll be using to to keep tabs on the particulars in the '16. The tilted mount is on it's way, and I expect it will be done well also.
In my conversations with him, he said he makes a vent mount for 17 and up.
No affiliation, just a purchaser that was happy. You may be too.
I'm not sure if I will let the surface be as is or not. 3d printing doesn't create super smooth surfaces out of the gate, but sunk into the AC vent and having the gauge mounted may minimize the visual on the mount itself. I do think a quick prime and shot of gloss black would make it smoother on it's face.
A couple of pics are attached.
And when I get going on this, I can update as I go along.

 

I have a ham radio mounted on a proclip and the wiring was was easy to hide.

 

jav-eee, my dash does not look like that. You have a different trim package, mine is a large open tray.

So the iDash is mounted. Super easy, literally a 10 minute project.
Pop the AC vent out. Remove the front plastic chrome trim from the vent, remove the louvers.
Drill a hole for the wiring to pass through the vent between the flared area where the louvers sit and the foam seal on the vent. The OBD wiring is easy to push up to the vent area, through the hole in the vent, and the ring. Reassemble the vent, sandwiching the ring where the louvers used to be. Push the whole vent back in the dash hole, plug in the OBD-II cable, and set your PID's.

 

That's a nice clean look. I wouldn't be willing to give up the reduced air flow in the summer months for a gauge blocking the register like that.

 

I have my gauges mounted this way. The only trade off is you can't see the cruise control icon. Other then that it's fine. I prefer analog to digital and I didn't want my really expensive tuning device hanging out where anyone could see it.