In reply to Flatus Vetus:
> (In reply to Pritchard)
>
> Viper is more climbing orientated than the Aztar, especially if you fancy going leashless
Seconded - though there's no reason you couldn't use Aztars for a lot of routes, especially if you 'customise' a bit:
http://talisman-activities.blogspot.com/ - scroll down to the 28th
also: