I have a happy wife. I bought her a hogwarts express and it had a problem of jumping track on the curves. We were using the 0-36 track and I tried everything up To putting additional weight on the lead truck. Today I bought 0-48 curves and it now stays on the track. She can now run her train. Problem is now I need to buy more track so she can make more than just a loop. Sent from my iPhone using Tapatalk - now Free