Is it a good idea to turn the recipe public? I really don't know, I see not so many people interested in this developer. Maybe there are no advantages when compared to others and it may also turn the art of developing with coffee boring. Yes, you prepare about 500 ml of the developer and you are done for 100 films or more using higher dilutions like Parodinal or Rodinal.
Yes, I expected more interest in this developer, I announced it in 3 different places and onle very few visitors and comments. I think I will wait for a while, when I see that enough people is interested in knowing the recipe. Of course, for those friends who visited or commented they may send me a message and they will get the recipe.