Re: What is this "vise"?
I also liked the grooves for the JB. Kinda like a keyway and far more gluing surface. And the escape hole was an excellent addition. In my 20's I did some side work with pattern making for a small bronze foundry. There I was introduced to sprues and risers. Of course the JB needs an escape path. I like threads like this I love to learn, improvise and innovate. I wonder if anyone has ever threaded in a zerk on a big repair and loaded up a cheap grease gun with JB and pumped away? And don't forget the escape hole! ( Is that the sprue or the riser? been about 50 yrs) 
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Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1946 Tonner Pickup with 226 H six, 1979 Toyota landcruiser wagon, now wearing 1947 Ford Jailbar sheet metal. 'Rusty ol' floorboards, hot on their feet' (Alan Jackson)
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