I have tried this feature with nearly identical figures and it just don't work for me ever! The similarity to the original pose is vague to say the least and IK on or IK off the hands and feet end up utterly twisted... I have found it is easier to adjust the original pose from a different figure than a "universal pose" made from the original. Even the universal poses that come with P7 seem to work only on P7 figures, only on P7 male really. This is my experience at least :(