distracted wrote:2) It's only "flakey" because you hardly ever use the system... And if it were so flakey, would you trust the system with 13000+ runners at one event? - they do at Jukola each year and don't seem to have a problem...
I could be really unkind to emit here and mention the 10-Mila in 2001 (?) where they struggled to get any results out of the system. To be fair that was because they were trying a new system (bad idea!) and had really bad luck with the weather (probably not unexpected in Sweden in April!). I don't think SI have ever managed to have a catastrophe on that scale though...
The emit touchless system is asking for trouble mind since it removes one of the essential ideas of the emit system (no need to worry if the electronics don't work as the backup gets punched) and means that you need feedback, which as distracted said wasn't part of the original emit concept. It also means that there is a single point of failure (the brick) which only affects one competitor in the event of failure and cannot be traced or recovered. For SI, in the unlikely event that an e-card dies, there is actually a backup in the SI boxes (even if the organiser isn't meant to use it), and an SI box failure will usually affect more than one competitor and can therefore be more easily traced.
As a general rule, then as a competitor I would expect the function of any item given to me by the event organisers for use in the competition to be the responsibility of the organisers, particularly where I am not in a position to be able to reasonably check it (e.g. emit card battery, glue holding the guts of an SI card in place, ...). Certainly for internationals the rule was "always use the official e-card as if it goes wrong it's not your fault".
If I was running the British I'd therefore make sure I have a backup card, tape it into the brick so it doesn't fall out and make sure I punch properly so that the backup gets marked. If the brick dies then it's an SEP (Someone Else's Problem) so I wouldn't be worrying about it. If it was touchless punching then I'd have a pre-written complaint about a dodgy e-card in my bag just in case

On the other hand, if I was one of the organisers and didn't have a backup *timing* system in place at the finish then I'd be starting to sort one out...