I blame this forum for the next idea.
After reading about bain maries, double boilers, steam injection, and etc. here on HD I tried a searches on google for those and even jacketed boiler. Well, jacketed boiler got lots of hits for jacketed conicals which got me thinking.... I had a conversation with a friend about pushing steam into the jacket instead of glycol. He had some caution about how they are constructed and welded internally but the one I have should handle steam if not done under pressure. Makes me wonder about using it as a boiler. I could do a test and see how well pumping nearly boiling water instead of glycol works to heat up water in the conical. It could be that moving hot water is enough and not need steam.