Thanks CJ. I learn with each time I do this. I am using a combination of bone charcoal with normal wood charcoal. It comes from Peter Dyson over here and I don't mess with it really. My cannister is a good size, pictures on my blog, and give's a reasonable space on the inside. I can do one action and plates, hammers etc in one sitting so to speak.
I make the water as cold as I can and aerate it for 2hrs before the quence...this time I kept the compressor going just to see what would happen. I don't think it makes much difference. I shove as much ice out of the freezer in the barrel 20 mins before the quence to get it as cold as I can.
Will carry on playing, thanks for the advice.
T