ORIGINAL: Matt / PA

For the love of God are we talking about rubber bands or O-rings? Would SOMEONE please clear this up?

I would NOT put an o-ring similar to what Rage uses for their blade retention AROUND the blades themselves.
I would put a simple dental/rocket/snyper yellowish stretchy little style rubber band around the blades. They stretch easily....hard o-rings do not, and are easilt rolled, slid or cut out of the way as the blades deploy.

If you put an actual thick inflexible rubber O-ring around the blades like that black one UNDER the blades you are asking for trouble.