stronger joints for bender

This remix is for the original design https://www.printables.com/model/73094-articulated-bender, which has had its joints modified using this other design https://www.printables.com/model/453411-remixed-arms-legs-and-accessories-for-articulated-.However, the pieces connecting the shoulder and hip were very fragile and kept breaking. So I redesigned these pieces, and now it's easier to print and much more durable.