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@Dogtemple
This is it, made from a dehumidifier for the vacuum pump and a co2 bottle for the chamber with a 10mm thick bit of polycarbonate on top as a window. Quite home brew but did the job for about 20ltr of silicone, 1ltr at a time. Was looking about £35 + post. It packs up quite neatly in to the bottle so doesn’t take up much space.
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