I got back into RC flying back in 2008 after a decade hiatus by buying a Tower Hobbies Trainer 40. Except for a ten month break when we were building our house, the plane has flown every week for those five years. Today, I was flying for the last time before heading back to the USA to work and had a rudder clevis pin break off. I was wondering why the hammer heads weren't happening with the 82 inch wing I have built for the plane, and noticed the rudder surface fluttering hard as I did a low pass. We replaced the clevis and kept flying. Later in the flight when my stepson was flying, he ended up in a spiral that I had to grab the transmitter for, and barely recovered. Back on the ground, we find that my two year old Futaba 6EX aileron stick pot is not working with right stick from 0-60% of travel. You move the stick and nothing happens until the aileron moves suddenly to the correct position. My last 6EX transmitter had the same problem on the elevator stick after three years of flying so that must be a common wear out mechanism for that lower end transmitter.
I didn't like the look of the ARF clevises when I put the trainer together and put in Dubro clevis hardware on the ailerons, elevator, and throttle. Used the original hardware for the rudder only. Glad I did that as a rudder failure is easily recoverable.
Here are a couple of photos. The tire rim burst about three years ago when I used to do a lot of touch and goes on a paved runway. All in all, I can't complain about the return on the investment. Not a lot of money but a lot of flying in those five years. The OS 25AX is stronger today than when it was new. It does look like I'm due for a radio upgrade however!