Brief article here-
aterrakayak.wordpress.com/2015/04/29/the-new-carbonology-vault/
I spoke to the guys at Carbonology a while back and apparently the new Vault is basically a low volume Zest - 75kg or under (if I've got that right - can anyone else confirm?) Based on Robin's views of the Zest it could be a great design.
I'm keen to hear first hand reports also...