Tired of floppy ball joints? I was. This isn't so much a tutorial as a product endorsement, but I'll put in a half ass how to, too. Like a lot of you, I used bionicle lego ball joints and stuff I had left over from broken robots for a long time. Eventually I happened on ball and socket joints commonly called "doll armatures" because they're used to make skeletons for dolls and stuffed animals. Each segment is a ball attached to a socket, so there's only one type of piece. You can find the white ones by going to craft sites and looking for doll armatures. I think they're knock offs of the black ones, which are brand name Loc Line and you can by at modularhose.com. Loc Line is used for channeling water in aquariums and some industrial things. Both are quality, the knock offs are nice because they're cheaper and come in other sizes. 1/8" and 1/4" are where I usually stay. The 3/4" is ridiculously huge and could be used for Unicron's shoulders and combiner joints. They can support that much weight and be sanded to detach/reattach easier. There's also a 2.5" size! Ridiculous! But I guess people don't just use these for toys. These things crush lego. They're durable, incredibly hard to snap together, and most importantly, tight as hell. I've got customs that are a few years old and have been fiddled with a lot and the long snakes of ball joints still hold as much weight as when I first got them. The arrow is pointing to magic. There's about 20 ball joints EASILY holding up a 6 ounce object. Try putting together TWO lego ball joints and doing that. Instant frustration. Obviously, these can make awesome custom display stands, too. These things bend about 25 degrees in all directions, which is their one weakness. Comparatively, lego can bend a good 180 degrees on one plane, but only about 25 degrees in every other direction. So, these aren't great for elbows since you'd have to chain a good 5 just to make a decent bend. As you can see, I use these for necks, waists, shoulders, hips, wrists, and ankles. They really make blocky robots come alive. The process is easy. You drill a hole where you want the socket and then you glue in the socket. You can just screw the ball in place, or you can drill a hole for that and attach it socket and all. After the adhesive cures, brute force the pieces together. It can be really hard. I'm baffled that no-one seems to use these. I just know there's a grip of customizers that are tearing their hair out because they can't make their combiners stand under their own weight. I know I would have quit customizing a long time ago or at least given up on my awesome designs if I never found these things. If you want more examples, you can literally look at anything in my customs gallery except for a few exceptions.