Getting ready to cast new bumper finials for the Roadster. They are the rubber trim pieces the rear bumper ends fit into on the body. Have my plugs and molding boxes ready. I need a small vac chamber to degas the mixed molding compound. I would rather make one (satisfation) than buy one (expense); was thinking a capacity of 1 pint or so container. How about HDPE shedual 80 pipe and end caps? I have a good enough vac pump, and don't really need to see the degassing; just pull it for 1/2 hr or so. I was thinking glue the bottom cap, and just have a sliding fit of the upper, with an O ring to seat against. A fitting with valve for the vac pump, open it for re-pressure. Ideas? JR Dweller in the cellar
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