I have had more fun down the shed, and now have a completed and working cold smoker, and Iam real happy with it.
I fired it up this morning, and ran it at full throttle to both cure the cabinet, and see how long it would run. It works perfectly, and went for two and a half hours before running out of fuel.
My friend, who lives two doors away, also has built a cold smoker. This is a four drawer filing cabinet, and he has put the flue straight through the wall of both the cabinet and his shed. He's got a bit more work to do, but is basically there.
Here's some piccies for your inspection.
I now have to get hold of something to put in it and see how it turns out. Even if I need to, with it being a small cabinet, I can chuck in the ProQ smoker and leave it going over night.
Thanks for all your idea's and help.