Nice!
I'm sure you are aware, if you need a new dongle due to CMOS battery expiry or want to get it running outside of a cabinet then AndyGeezer is the man, he has a service kit and will authenticate it to your unit.
I have a NOS unit as well and was surprised the CMOS was still going okay!
The DBAC hardware has a million checks on matching exact monitors, 3 x IO's and other things, including motherboard etc, it's very hard to get it working.
Here is a rare photo of it running in window mode on original TX2 hardware.
View attachment 22946