Well, I've now replaced all the clevises that came with the plane. I'd recommend that anyone else who buys an ARF do the same (at least check all of yours to see if they need replacing).
I think it should now be just about as sturdy as I can make it. I'm REALLY hoping that I get some stick time this weekend!
That reminds me, I'm also going to my first club meeting tonight. I'm going to be working on the club website and we've got to start discussing what they'd like to accomplish.
Wish me luck on that too!