Tool to create a temporary IK on any set of objects, preserving existing animation!
Simply select 4 controls - the first is the parent and then the next 3 are the controls you want to make IK. For example, to make an FK arm a temporary IK: select the clavicle, shoulder, elbow, then hand.
This version will simply place the Pole Vector of the IK on the knee
This version allows offsetting the Pole Vector of the IK from the knee. It takes a little longer to create and uses a UI