I agree! I know that some attempt was made to have the tank temperature controlled / regulated by computer (such as it was at the time) by the new owners of Vitro when they moved it to Anacortes, but . . .
As far as I know, the closest that Peltier ever came to flames were the feathered slags. Some individual ones have what appear to be flames at some point in their patterns, but flames certainly weren't what Peltier was looking for. "Striations" is the word used over and over in that one particular patent. I mentioned it really because one of the patent drawings is a good example of a modification to a nozzle, if anyone was interested.
I particularly like the Alleys with the fern-leaf-tree or leafy branch pattern! I get those whenever I can . . .
And I like your new agate experiments, Dave!