I am thinking of getting the passenger arm rests for my 14 XCT. My 9 year old son is asking for them because he says it makes him feel safer. The question I have is, how sturdy are they? Looking at the pictures I am wondering, can the passenger put any pressure on them without breaking them? They don’t look very sturdy but looks are sometimes deceiving. Also I have read some things about them swinging out by themselves. Is there a long that will lock them in place or will this be an issue even if I don’t have a passenger?