Thanks Terry!
Ryan- This cylinder was kinda iffy during the plaster investment process. I misjudged the water in the mix and the plaster went in like peanut butter, creating accidental large voids the aluminum would fill (blue circle) also, the aluminum was poured slightly cooler than optimal, which creates the 'marbelized' pattern in the purple circle. -but this would've been cleaned up while boring to spec. I'm mostly worried about the imperfections in the orange rings, as it looks like some plaster or sand gathered in such a way to defect the top of the port. My latest mold is using a different plaster mixture ratio and I will be pouring the aluminum at a higher temp. *fingers crossed!*
