OK, fair comment, and as I haven't got into Audio tracks yet I bow to your superior knowledge. However, I would still like to be able to flow from one to the other much more easily and have only one set of MIDI / Audio setup / Patch selection (e.g. higher bank selection in Realband) etc.

Probably comes form the fact that I still use a lot of MIDI stuff combined with Realtracks and I don't have enough MIDI manipulation tools in BIAB, so I have to go to RB for that.