Im a BIAB guy as well and have a question. I have a probe that doesn't go into the mash itself rather the water around my bag it shouldn't make a difference right? I don't know why but with my set up im constantly fighting temp loss in a heated garage!! I even tried wrapping the kettle with no measurable difference so i figure i will just hit the burner every 15 min or so (on low) and I have the bag tied to one of the kettle handles so it doesn't hit the bottom and melt. Im always in the 148 to 155 range.