"This was a truly enjoyable build and my first large one since I was a kid. I especially appreciated the numbered bags as they made it possible to find pieces in a reasonable amount of time. The pneumatics worked great with no rebuilds and, as usual, the instructions were excellent. I was really impressed with how simple the system was, kind of like a reverse train engine where the rotating motor generates linear motion which fills the system with air. The only real issue I had was the flexible pneumatic tubes gather dust and cat hair like nothing I've ever seen!"