This is our own stand alone model. We've had it for awhile but recently made improvements to the hip joints, and also added the spear prop, Traveler's morphs, and (BTW) the neck morphs are from background, not Robert. Sorry, Ian, my slip up. :/ I'm not familiar with Nerd's Centaur and will check it out, but to answer your question, the joints work very well (especially after the new improvements.) Thanks. pg