Yaw Damper Servo
If you intend on installing a yaw damper servo as part of your autopilot package, there are a few things to note:
First, you should plan to do the work of installing the mounting hardware early on in the build process of the tailcone. It's much easier to do while you still have good access to the cone!
Second, note that Vans sells mounting hardware for the RV14, but not the RV10. However, the hardware will work pretty well with the -10. This thread in the forums has good information (https://vansairforce.net/community/showthread.php?t=153870), see also this FB thread.
Specifically for the G3X, Garmin sells a mounting bracket kit for $750! You can use the Vans kit for a much cheaper cost. There is nothing about the Garmin kit that justifies the price other than people are willing to pay it.
Note: The elevator pushrods are later threaded in from the rear through the opening between the F-1037B/C ribs with the F-1035 battery / bellcrank removed. Therefore, the installation of F-1035 and the servos is of temporary nature at this point of the build.