Don't know much about those numbers, but the image you posted has a black background and the legs are black. I can't see the legs at all ;-) The feet look stretched. Deleting the IK chain in the HE is easy. Open the tree select an element and use the delete button on your keyboard. Creating a new one is done by dragging/dropping the leg and foot parts down to the chain name in the right order. I think it goes "thigh..>Shin..>Foot", the goal being last. -JH.