I had to order some new bearings for the shoulders. The one's I had were 6 inch which was fine, But they would not leave enough room at the skins for the legs to be removed easily. So, I ordered some 4 inch bearings and they fit perfect. Actually I may have stumbled onto something Dave E. had already thought about. In his plans the shoulder area has 4 drilled holes that do not come into play. Unless you are adding this same bearing. The holes are a perfect fit.
Please keep your comments clean and G rated. This site is for a family or children to enjoy and learn about building their own Droid. I hope this helps others that have had a dream of having a Star Wars droid in their home.