no pump, didnt even vibrate the plaster just hit it with a stick a couple times to get the big bubbles out. for prep all i did was make some sprues and pours out of scrap polycast so the thing could flow nicely. then pick up graphite crucible, one big pour and let it cool. then chuck plaster in a bucket and rub it off the metal.  im not a pro, it was really easy with zamak alloys. i was casting mortar shell bodies in terms of geometry.   its worth the price if youre casting with expensive alloys or using a lot of plaster because complete burnout is like flawless > wtf is a chinese forge like a shitty $120 propane melter setup.   get a simple enclosure to start with. it will make it more energy efficient and will trap a lot of particles. move it to least occupied room and add a bentobox type recirculating filter. after printing wait an hour or so to pull your parts.
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