That's a great vid, Dan.  Hope the salmon was scrummy!  

 (I'm sure it was.)
I was interested in the compressed wood chip disks you were using.  Our local groundworks company produces a lot of wood shavings and sells 
big  bags of them to horsey folk for £3 / bag.  He has now also got a machine to dry and compress them into those little disks, which he sells for a £3 a much smaller bag.  The dry matter content is the same in both bags, he says - as you would expect the compressed one takes up less space, huh.  We buy the odd compressed bag as the disks are brilliant at getting a fire going or recovering a dying fire.  (So is sawdust but the little disks are cleaner in the house.)
Seeing you taking the disks out of a little poly pack made me think to tell you about our local supplier in case you have a groundworks co near you who does the same - the guy near us does all the National Park / English Heritage etc footpaths, gates, etc., for a good few tens of miles around.
Unless of course you have to have food grade wood shavings for smoking food...?