I just went through this.
https://vansairforce.net/community/showthread.php?t=190703
I opted for installing it on the middle inspection panel of the left wing. Others recommended fuselage under the left horizontal stab. The latter would have been easier in terms of running the wiring to the ADAHRS, but I was advised by both Dynon and Advanced Flight that under-wing was preferable. It turned out to be pretty easy to run the wiring through the left wing, into the fuselage, and down the tunnel to the ADAHRS. The AOA and pitot tubing was more of a challenge. But do-able. If you install it in the wing, you will almost certainly have to splice the cable to the OAT probe. It's only 10 ft long. I don't know if that necessary if you decide on the tail location.