Trainkit won't turn

Hey, I have currently made myself a train, made hinges for the boogies. I am using the VehicleSeat2 Train Kit. I would like my carriages to turn around bendy tracks, although it just stops the train completely; It makes it unable to move/work.

I have tried looking through many devforum posts, asking my friends who have made trains and unable to get the information I request.

I am wanting the train to turn around the corners. What’s the best way to gain this. Is there any other kit I should use for this?

Thanks in Advance.