Using SS beakers with temp control hot plates is not advised by most manufacturers. IDK the full reasons for the problems, but I do note ultra rapid heating of the base wrt the top of the solution/beaker and I notice that radiation from the top causes a severe temperature gradiant from top to bottom.
Actually, I wish I could use a Kodak mixer, but I think that they would shoot me if I tried to get one out of the plant. That beats them all, and there is nothing like a steam CTB for temperature control with a cold water sparger on the cold side. Makes me homesick thinking about it.