Expand
You just have to do it by feel. Once you figure it out, you can go by measurement if you always use the same flour ... at least if it's a consistent brand like KA.
If you switch from bread flour to AP you'll need to reduce the liquid quite a bit. The higher protein content of bread flour soaks up much more water.
But it would be nice to know what I should be feeling. I guess it's just a matter of experimentation. Very good point about bread flour soaking up more water. That's exactly right that the extra gluten (which is a protein) has that property.