NOTE: this article is obsolete and kept here only for reference. You should refer to the Cheiroballistra arms article for updated information.
The process step-by-step Edit
This page shows one way to reduce the weight of the metal hoop used to reinforce cheiroballistra arms. Essentially, only the top surface of the hoop is full width, as it needs to protect the cones from impact with the curved field-frame bars:
The method uses to attach the hoop is the same as described here.