Originally Posted by
Chombi
You can also go with a Mavic BB that uses tapered lockrings rings (they seem to be plentiful at eBay), but you will need to find access to a Mavic BB shell face tapering tool.
I think VO copied the Mavic BB with their version. Patents on it might have already expired.
It was a good idea, but seems to have been "Betamaxed" into oblivion as threaded BB users never really saw the need to switch over to their system.
Chombi
No, unlike the Mavic BB, the VO cartridge does not require any chamfering of the BB shell prior to installation. The Mavic BBs are nice, but be certain you have access to the chamfering tool before you buy one.