vacuum


 

While resuming my modeling efforts I find I need some additional castings that are too fine to fill molds without vacuum.  Obviously I now have no access to a high quality vacuum pump and don't wish to pay for one.  Does anyone know if I can get away with a $100 pump?  I'll be using very thin urethane resin.  And I can accept a high percentage of rejects. - Al Westerfield

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