Rangeball,

Haven' t tried one but it looks like a really great rest for hunting.
Contains the arrow like the Whisker Biscuit except with metal fins instead of synthetic bristles.
It looks far more rugged and should last much longer than the Biscuit!
You may be on to something there.
There have been other rests like this in the past and present but this one looks way better built than others.

Sag.