Thanks Charlie I do use proper woodchips in the smoker oven and mix them with the manuka sawdust. I have been using the manuka chips since I found a local source for them on trademe as they sell the chips when they are still green. When I run that smoker oven on low heat the chips won't even smoulder I was thinking about doing a modification to it as it does not have an intake vent like the kiwi sizzler smokers do to allow cool air to be drawn in it only has a top vent to allow heat and smoke to escape, so have been thinking about getting some aluminium to make up an adjustable intake vent but before I do that I might try running it with the door left ajar to see if that helps keep the temp down. a mate of mine who is no longer with us used to have an old wooden packing crate he used as a smoker and he used to hang fish from that and light a fire in the bottom of it inside an old roasting dish and they never used to fall off on him but they used to sit higher up where the heat was not so intense.