Yes, keep the thread alive, the YS-X6 is really great. I do think if people are investing in a pricey autopilot system, they also need to attempt to mount it on something decent (frame).
I still love the coaxial setup Fajar. Looks steady, and very robotic.
Here's the YS-X6 on my new frame:
The GPS antenna fits really nice on the crash cage, and is far enough from the IMU. If I have any issues with GPS, I may shield the inner of the dome with copper tape and wire it to neg.