I eventually went ahead and bought the whole caboodle that SXK makes. Took me a while to get there. I have to say the whole Billet box idea never really exited me. It all somehow suddenly changed recently. Now i'm thinking this will be just the thing for me. This is what I bought.. The Billet box standard kit... The exocet... The vapeshell... The insider... The boxxer tank A spare boro tank... I'm eagerly wanting some comments on how people find these as there isn't many recent threads about it here. Any comments very much appreciated. Thanks.