Extractor Vent

With my second laser still coming and going at a moments notice (soon to be permanently dismantled in my garage though) I often end up with a spare exhaust port that's just sucking air in and not pulling air from my main machine. I made up this close able vent which sites between 2 blue pipes and allows me to turn the tube off when not in use. It's made from a few stacks of 12mm ply and it works ok. I think it might be better to develop a shutter type version for both sides (and when I box in the extractor) but it's not bad for a first attempt.

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