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I recently got a job to make an object that requires a 4-piece plaster mold. The design can be conceptualized as a extruded cylinder along a curved line that abruptly ends and is closed off at one end. The other end which will be open is where I will pour the slip. For some reason I cannot figure out how the air will be displaced as I fill the mold with slip, if you see my attached photo, is it possible to cast this object as it is designed? It's ridiculous that I'm having such a tough time figuring this out. I cannot use a sprue at the end simply because the object needs to be closed on that