many thanks, jonthecelt, but I knew that..:-) I'm only concerned with the V3 walk as defined above. All I want to do is set my V3 to the correct offset in Z at frame 30 such that the animation works correctly. I've stepped (pun??) through the animation carefully, watching where each foot lands on the floor and takes the weight. At that point, the load-bearing foot should stay in exactly the same location whilst the rest of the body moves. I know my physics:-). I'm close, but I'm just curious to know if there's an exact number (in straight-forward - ie Z axis terms) for that specific walk-cycle... Cheers Diolma