Technical question…

[u/Dafishy4]

So understanding the benefits and drawbacks of “double” or “twin” boiler setups and also understanding why the Stirling Single and double did and didn’t work, would they have benefited from doing a double boiler one stacked on the other with a heightened firebox? Or would the drawbacks still have outweighed the benefits if there were any? Wondering for a project I’m working on in Lego.