Happy to run another one. I’m tied up this weekend but I can plan another soonish. Maybe early spring on a -hopefully nice - Saturday morning. The last casting I produced was the headstock casting. I had a large, full pot of metal and the pot burnt through, same as at the last demo I ran. It was probably the most unnerving pour I’ve ever had to deal with. I can’t have that happen, again, especially not in a public place. I need to work something out that’s safer - nothing beats a proper crucible and matching shank. It’s all money, though, right.
Gas is good and convenient. Constructing a burner is reasonably straight forward, especially if you have access to a drill press and the tools/materials to be able to silver solder. A regulator is desirable (and probably advisable) - I just make do with a needle valve to control the gas flow. There’s a lot of info (zoeller forge, mongo burner, Ron Weil’s burners, Z-burner, Make it Extreme, etc) on constructing burners but it’s mostly American and it can be challenging to find the same parts.