I'm BIABing in a Blichmann 20G, and am not finding the probe to be an issue at all. Sure, fill the gap and use an external thermometer if you prefer, but it shouldn't be a problem. Much depends on the bag, of course.

I've been brewing for seven years or so, through the usual progresssion of kits to modified kits, to extract and grain, and finally all grain. I love BIAB for its accessibility, and the fact that the process is still evolving. I found this site through internet research, and am really looking forwar...