I've had I think 5 Thomas' stop in the last two years.  They just stop.  Trying to figure out if running them the exact same speed is a problem. I bought another new Thomas in July and it has stopped already.  Need to send 3 back for repair again. Generally only run on the weekends but at the exact same speed. Room is dry and air conditioned.  If anyone has any ideas to try, I am all ears.Are there voltage parameters I should check the control for?  Have a Percy running most of the time on track right beside this one and it has outlived all of them and keeps chuffing away.  Only track difference is Thomas does go up a 2" incline in about 8 ft of straight track. (Each track is aprox. 40 ft)  Percy's track does have 4 side rails for James, Gordon, Henry and himself.

Any thoughts out there.