yes, flipped it upsidedown so the tail thread section was facing up and doped the interior with thicker plaster before dipping it into the thicker plaster to ensure there wasnt an air pocket. sprue simply scrap polycast i ipa'd to the tail thread section. hacksawed off sprue and re-used it when i was done   i based literally all of this on    k2hwn4li dont use soup or tincans unless your part fits them near perfectly. i tried a coffee can at first and there was so much plaster it insulated from proper burnout for way too long, result was the coffee can collapsing partially and ruining it kek. try to get a container that fits with like idk 15-30mm of plaster on the sides of your object?
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