mashing with cracked corn

[1965 wite]

so ive done a lot of ujssm and sf sour mashing. i have some limited exp with all grains but have only had two successful runs. I have run into problems with my mash clearing and i think i have may have scorched some cracked corn on my second run.. i have a ss clad 25 gallon mashing pot that i would like to employ. im going to make a insulated blanket for it to help hold heat in. I cant really see it being cost effective to use flaked maize and would like to go back to using cracked corn. I would like to make bourbon grain bills and i like alot of character in my drink so im assuming i will need to ferment on the grain. i was also thinking about building a automated stirring mechanism for cooking the corn to keep the corn from scorching and save me some labor. how do you do it? do you ferment on or off the grain? how do you keep the grain from scorching? do you use brew bags? any advice would help.