Doing some preplanning for a tv set with 5 small (16" side) periaktoi nestled in a little cove in the wall. I wonder what you guys have done when it comes to locking them in place. They would be preset before shooting, so no live movement. I want to make sure they can be fixed in place, I'm leaning toward a linkage for all 5 for ease of transitions and it seems like it would make locking them easier. Any ideas? Ball catch, pin through the link arm into something, maybe just more friction in the pivot?