I'm with you ...
However, devices must not rely upon spring loading for stopping coz if the spring fails you go down. Racks and unicender work on similar principals, camming actions are the alternative unless it's engineered so that if springs fail you lock off.
Which brings us back to the gri gri or the unicender type device.
At the end of the day the $10 piece of rope is starting to look pretty damned good isn't it.
