Sorry, I forget that they have those cool things now and again!

Since I learned to soap back in the dark ages, I can't tell you at what temperature your soap will overheat. I just know what I said already, and after you have soaped a while, you will see when your soap is getting ready to crack. If you bake a lot you can easily recognize the signs too. It is like baking bread. The top puffs up, rises some, and then the crack comes. If you catch it in the rising stage, remove the extra heat and cool it off some, then it won't crack and it will be just right. Then the next time you make that recipe, don't insulate at all and see if you get gel. You may have to experiment some; partially insulate, insulate and then remove after a half hour or something like that. But, with good notes, you will find the way that works for you and your recipe. Good luck!