Well the frontier typically only comes with the two sections but it was a show special so I got another chamber for free.
All of them latch together it is impressive. Very convenient to move it. Also because the inner chambers come apart it is easier to get at things. THe doors are smaller than the WSM but since it is convenient to remove the sections I don't think it will be an issue.
The charcoal basket is very well constructed (about 3-4 inches deep too!) and the water pan is very deep as deep if not deeper than the brinkmann charcoal pans I have been using for water in my WSMs
IF you all want check out the specs for the Frontier here:
www.probbq.co.uk
It also turns into a grill.
I met the owner Ian while in Barrie. He is really dedicated to getting it right. Also he is designing additional space chambers for the WSM's. He is currently working on a prototype.
Additionally the lid has a line of hooks to be used to hang ribs fish etc. I am thinking I will do bacon in it for the first time in about a month or so.
I am impressed with the construction. I need to get the wrench out and tighten everything up now but it is almost good to go.
Here are some more pictures.