I generally don't use two clevises on the same pushrod. It looks like you soldered the Gold clevises on and that should work. But if your solder joint breaks loose that rod can rotate out. Soldered clevises can be very strong if done correctly. I just recently built a Bonanza that used a single flex cable running between the ailerons with one servo driving both ailerons. I had to solder the clevises on the cable. It works great. But I was very careful. My first choise would be to use a Z bend at one end of the rod and a clevis and the other end. Its more bullet proof. And since you can easily make that type of installation, I would. Soldering is generally a technique that I use only as a last resort, (except for the throttle). Its just a thought.

One other thing to know. Back in the day, when flat spins were really flat, guys were getting 70 and 80 turns in a single spin. One technique used to make a plane flat spin better was to mount wieght out away from the CG. Mounting servos in the tail, as you have , would be a great way to increase the flat spin potential of a model. Having said that, Stiks don't spin that good, so I would worry. But with that mass mounted in the tail, the plane will have rotational inertia in a spin. You might get some freebies. I don't think its anything to worry about on a Stik. But you might notice something a little weird going on at times. So keep that in mind.