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  1. I've been thinking about how to bring vacuum pressing for veneers, etc. into the range where an enthusiastic amateur (is that an "enthusiast"?) could throw one together for a project or two without investing in Venturis that require compressed air, etc. Essentially this is a vertical bike tyre pump but with both valve's air flow directions being reversed. Instead of pumping air it becomes a positive displacement pump. What are people's thoughts on this? My first concern is about the quality of vacuum this might be able to pull and as to whether an auxiliary vacuum reservoir would ensure that it could be held indefinitely. Certainly, the pump should be isolated from the target once sufficient vacuum is achieved with the auxiliary reservoir chamber smoothing over any softness in the vacuum. I'll have a look around the local hardware stores to see if suitable materials are to hand, which I would have thought they would be. Generally that is the first test for any project of this nature :-)
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