Custom Torso Design
This is a custom toso design I have built using technic peices that connects effectively to a bionicle. It has many practical uses throughout building, and has plenty of open areas for adding/improving pieces (connector pins and axle holes, etc.). The torso also has a built-in gearbox function that rotates both arms, and has a good amount of friction (so the arms can stay in position). It has 5 ball joints available, two arms, two legs, and one head. Unfortunately there is no open area for easy CCBS connection for torso armor, however, that can be changed if you want - the way I currently have it allows for older styles of armor (sort of).