Adrian,
from what I recall of my correspondence with Chris, it wasn't so much the end float of the cans which he'd got wrong on his first Raid Oz, but the much more common mistake of having the corner weights all over the shop.
His car was 'perched' across a diagonal, so that far too much weight was being taken by one front corner and the diagonally opposite rear corner.
As an extreme example of this, on an aks400 which I worked on earlier this year, I found that one of the canisters has been replaced with an Ami Super canister, which had been made to fit by shortening the (originally front) tie rod.
The chap who'd owned it for the preceding 5 years finally understood why it handled in a manner which could only be described as 'lethal'...
From what I've seen, checking the corner weights is something that is very rarely addressed during the majority of chassis changes undertaken by either amateurs of professionals, reliance being placed instead on equalising the lengths of the threads projecting from the shackles at either end of the car, which doesn't always work.
However, even without access to corner weight gauges, a reasonable job can be carried out by using the 'tripod' method... 
I'd agree that ride height settings, canister end float adjustment, choice of damper (and also adjustment of front bump stops?) all play their part in setting a car up to handle well.
Perhaps it's worth mentioning correct installation of dampers as well, since I found some on an aks400 at the w/e which were fitted back to front.
There are also those dampers sold for A series vehicles which will never work correctly, no matter which way round or up they're installed... 
ken.
toomany2cvs wrote: I think that's down to people not setting the spring cans up properly, without the correct amount of can movement.
Given how soft 2cv suspension is, I can't see how chassis flex can do anything but hurt ride/handling, unlike on other cars with considerably stiffer suspension. OTOH, bad setup is going to murder it. IIRC from the old days of the 2cv-l YahooGroup, one of the Aussies (Chris Stuart) did a lot of work to get his car's suspension right, and the differences from spring can adjustment, ride height adjustment and damper choice were dramatic.
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Interesting. Can you explain the bit about the can movement? I'm always happy to shift my bias, if I can improve the set-up, I'll be very happy