Why can’t you copy a pie in the practice account. I thought the idea of a practice account was to practice and test and see. Seems odd
Apologies for the late reply, @tradingtim 
Since only live accounts can receive updates once there is a change in the original Pie, copying a Pie on the demo app is not possible for the moment. Still, I understand your point of view, and I’ll pass your feedback to the team.