Basically what I'm proposing is a way to (hopefully temoporarily) toggle if an equip receives heat, be it with a Krogmo item, or just a plain old toggle on the item. If you're trying to focus on a single item, it can get incredibly painful to heat-- especially if most of your gear is not fully heated. You wind up having to use low-level junk just to get all the heat on one item.
Just my two cents, I think it'd be really helpful to crafters and shouldn't be unbalancing if implemented right.
I think what would be cool is instead of immediately distributing heat at the end of a depth, I think that heat could be stored then there's a menu where you can distribute the heat on your own.