8 years ago I learned to fly on Tower Trainer 40 with a OS 40 on it. The plane has between 250-300 flights on it and it's still flying. Every now and then I take it out fly for a little bit of fun. I think everybody should go back and fly their trainer at least once a year. If anybody is asking I kept my trainer around for sentimental reasons, I got the trainer from my dad after he died without ever getting to fly it, and I use it for "demo" flights for people thinking about getting into the hobby.