The arrangement below is relatively simple as all you need is a 2 wire cable to connect to the pilot's control column.
The two rod ends on the right are for push rods connected to the leading edge of the horizontal stabilizer. The two connections instead of one to the leading edge provides some lateral stability to the horizontal stabilizer leading edge.
It is all accessible from the removable panels on the sides of the rear fuselage.
The actuator was bought online. It most likely uses a a nylon nut and alloy threaded shaft. So far it has worked without any problems. There is another one in use that has flown over 200h without a problem.
The main risk with the actuator is it sticking or running away due to a switch failure. This has caused loss of control in the past. During the test flight it was found that on this aircraft there was enough elevator control to counteract the actuator at the extreme positions within a limited speed range.
It adds weight to the tail where you don't want it. I moved my lithium battery to the front to compensate. That saved a lot of weight and compensated for the CofG shift due to the actuator and mechanism.
If you plan to cruise at more than about 130kt you may need more nose down trim than shown in the plans.
To do that you may need to lower the rear spar of the Horizontal stabilizer. That is doable, but it is not a simple change.
While this system works on one aircraft, it may not work on another as each aircraft is different. Also changes like this result an aircraft that is different from the plans and has not been test flown before.