Gordon Tarpley is just a guy who digs building the costume of golden rod C3PO. The folks at Tested, met with Gordon Tarpley and went through the process of what goes into making a functional C3PO costume.
Gordon pays great attention to detail and to the many changes to C3PO over the movies including the most recent notable one, the red arm in The Force Awakens. The C3PO suit is a constant work in progress as Gordon continues to make adjustments and improvements.
Watch Gordon go through the anatomy of C3PO and all the elements he takes into consideration in making the slender suit and his awesome demonstration of his prowess and playing C3PO.