I think there should be a option of reverse animate model . as we click on animate model , the model will rotate in direction where the flag is facing in clockwise or anticlockwise . If the model is animating in clockwise direction , Some time we need the model to rotate in anti direction . But there is no option for it . So for that I delete the joint and keep the flag in antidirection , to get the anti direction . So , i think there should also an reverse animate model option .