- The A-ring, which is now in several pieces, can now be put on without having to squeeze bits through and avoiding a metal hinge. It works quite well once on but it is easy to pinch skin and/or trap hairs in the process. I suspect that it will not be as robust as either the solid or hinged predecessors.
- The outer pins, formerly connected to the cage, now protrude outwards from the A-ring once it is in place. I suppose this is theoretically better but not of practical significance unless the pins are to be left untrimmed.
- The cage has a narrower entrance which, as with the CB3000, is slightly elliptical. Comparison approximate measurements, vertical x horizontal, in inches: CB6000 = 1-5/16 x 1-3/8; CB3000 = 1-7/16 x 1-3/8. So I suppose it is like having a KSD-G2 insert. I had no trouble with insertion using almond massage oil.
- The cage is a similar overall size to the CB3000 but has more shaft length and less head space, although the latter seems more realistically shaped.
- The air hole near the lock on the CB3000 has gone so that there is now no problem with a metal lock. Strangely, the lock supplied (with just ONE key) has a black plastic coating which would have been useful with the CB2000 and CB3000.
- The central pin now has an elliptical cross-section and the spacer fits into both the A and B-rings. However, even more care now needs to be taken to avoid pinched skin.
- None of the components of the CB6000 are interchangeable with the previous models and nor does the KSD-G2 fit (which follows from 3 above).
On the plus side - the CB6K seems to fix the CB3K’s biggest problems by eliminating the A-ring hinge (which bothered some wearers), eliminating the upper vent holes (“PINCH PORTS”)and also eliminating the need to trim the guide pins (they now point AWAY from the body). Still, I don’t think I’ll be dashing out to buy a CB6K since I filled the upper vent holes on my CB3K, my guide pins are trimmed/sanded flush with the A-ring and the hinge doesn’t bother me. Additionally, my modified CB3K has a reinforced “split-proof” cage with a custom one-of-a-kind pink paint job and a locking anchor pin for my PA ring to prevent pull-out, so I regard it as still being superior to a CB6K … at least for me!
It fits like a puzzle. Think of it this way. The CB3000 you put the A ring on (hinged or not) and feed the post through the back, then the spacers, and finally the cage and lock.
With the CB6000 its all the same, except when you feed the locking post through the A ring hole, it has the rest of the “ring” with it.
Really, the only big difference is you have to truely watch and ensure you get a proper fitting so the “puzzle” pieces do not pinch.