I also have a complete ESS and MB3 but I believe there is an error with the z axis as it has never signaled properly since I purchased it. I bought it pretty far ahead of a project and when I got around to actually using it I was about 10 months in and didn't try too claim foul with it and simply used A pins as my Z axis so this is a 5 axis ESS as far as I could tell.
https://ebay.us/kWaV03
