After all the tests I have done with some bats can confirm it is true west does return but not to all bats it doesn't
I work a ratio of 2 ounce off 1 return but it depends if you blast it quickly or not.
I find that drying a made bat out takes time and more skill than I thought.
Where talking crust theory again love it, make no mistake though for weight loss there is a massive trade off and I have a theory behind over dried bats because I have done it a few times and the theory continues with low density as well.