Hi bdbssb thanks for getting back to me.
The turning issue seems to be that the tractor pulling it, the wheel s tend to catch on the trailer and so makes it hard to turn. I copied the xml file, not sure if it will let me post it here or not, but I will try and will put it at the end of the message.
Apologies for taking time to reply, I didnt have the notifications turned on.
Thanks again.
tipper7.xml