Fully automatic twistlock V2

This is my second version of fully automatic twistlock. Different is pushing pin which is now made from light material and placed inside a pipe. This construction will help to avoid bending and minimize disturbances during transport. Pushing pin should be higher than a pipe only for the length of movement. Pipe could be connected to main body by welds (like on the example) or by screws. It can have no any other connections or it could have like on the picture 5.