I brought this over so it doesn't get lost in the sprue thread. I'm building a reciprocating hammer to form some of the details on the 1/4 scale Willys. I couldn't find a drop of 2.5 x 1.5 DOM tubing so I whipped up a foam of the ram guide housing and poured it. I have done cast iron in the past and was a bit too casual with placement for depth and compaction and with the density and fluidity of the metal it washed out the core and I ended up with this misrun. I made two more foamies and decided to try one with a linseed oil bonded core I had left from the planishing hammer in my regular foam sand oriented vertically and another with a core horizontally in some dead Petro Bond I reconditioned with the muller. I stacked a cheek on a cope and drag flask and actually used the Jolt Squeeze for the first time to just set the sand, no rammer. I added a couple of holes in my flotation ring pointing down so it is easier to plunge to the bottom. Then gentle puffs lift the sand so the pattern can be pushed into position. It has been freezing here, but one hour from a cold start I pulled at 2400*, slagged and poured with no additional additives. I was using some old iron, and remelted the previous dud casting. I had poured a chill wedge when I did that and had beautiful grey iron all the way to the tip of the wedge. This indicates that there is enough Total Carbon to make soft iron at that 1/8" thickness and since the flange and wall of the ram guide are 1/2" thick I don't expect any issues. It's like Christmas, waiting for the glow to fade, but I don't usually pull the iron until it's cool.