About Arrowroot, Cornstarch, Potato Starch, Tapioca and Sweet Rice flours

So far, this is what I have learned (via trial and error) about the different starch flours used in gluten free flour blends. When a flour mix calls for cornstarch flour, you can safely substitute arrowroot flour (which is my preference). Often there is a mix of arrowroot/cornstarch and tapioca flours in a flour blend, but if there is just one, you can substitute tapioca for arrowroot/