Don't put in the middle, if your going to do a BIAB, the bag will get hung up on the prob. Best position is in the sight glass with a tee and a 4 inch prob. Put a false bottom over everything and brew away.

My kudo to the Ausie for comming up this system. After being a three tank brewer for years I love this system. I live in Lake Helen Florida, yes thats in the USA. Turning 65 this year and currently building a electric sake keg with the top cut off. I have not been brewing for the last 10 years, but ...