I did try straddling two burners. It didn't work.
I've mentioned a drop in heating element, but SWMBO wants to do something else as she cans. We will most likely get an electric burner, but I just don't see a 120v burner doing much better.
I need a fix for now as I have plenty of ingredients to work with now, and it's just sitting there (getting the remainder of my needs today).
It's too hot and humid for too long here in TX, and there's too many bugs flying around. Plus I greatly enjoy the way the house smells all day after brewing! Wish someone made a candle or something!