Wow, very interesting stuff, ironman!!
It looks like you are preheating your ladle with oil from your pressurized re-purposed propane tank, or is that really propane?
And the extensions are really interesting. I had thought that if my little single charge cupola didn't work out, that maybe I could just add an extension -- and here you've already done that kind of thing.
I know you're probably busy, but if you ever do get a chance I would really like to see a video of how you make your cores with Portland cement. I just mean a simple cylindrical core. I had real difficulty trying to keep a Portland cement core intact while removing from the core box. Maybe you just let it cure in the core box?
Anyway, back to your cupola.......fantastic! That's a lot of iron.
I was hoping to manage up to a ten pound pour, myself!
