Hullo all, team chronicler here. We're no longer confident that we can release a third BB. We've put clue 11 into practice many times, very vigorously -- easily vigorously enough that you can hear a bell-like ringing sound if the Isis is placed next to your ear. But whatever variants of this we try, there is no resulting difference in the sound of the bearings that might suggest three rather than two. (We thought we had a difference earlier, but I now suspect we were imagining it -- or something is broken.)
Without BB3, there's no point in continuing, but we've tried anyway. We think we know how to start, and sometimes the plunger exhibits the altered behaviour claimed, but it's very hard to be sure that this is "genuine" and not an artefact of the fact that the plunger is sometimes very stiff (and has a stiff point half way along its travel), combined with the fact that one's thumb is getting sore. The rest of the clues then sort-of work, but naturally the Isis doesn't open (or turn at all) at the end.
Obviously we realise we might be doing it wrong in any number of ways, but what I'd like to know is this: is it possible that the Isis is damaged in some way that's (for example) preventing BB3 from being released? It was a "free" Isis in the first place (I understand these may be seconds), and of course it's taken some pretty hard knocks, besides whatever it endured in the post. Is there any way of determining if it could be damaged?
If not, is there a five percenter out there who's in or near Cambridge (or London) who wouldn't mind just verifying for us whether it's working? Obviously we'd have to trust you not to abscond with the secret key, but we'd be happy to do that!