The thing with these FP films by Fuji is that once you pull the develop sheet, even if it's not been developed as instructed yet, it will still continue to develop and darken for a few more seconds. Atleast this is my expirience. You may pull the development after 8 seconds instead of the instructed 15, but the end result will just be an overexposed/poorly exposed frame in the end. There is no way to "pull" the film like you would with rollfilm. If I wanted to lower contrast on, say, a roll of Ilford Delta 3200, I'd expose it at a lower iso value and develop for a shorter time. But since the development time of the Fuji FP-3000B is allready so short, measured in mere seconds (and after you pull the develop sheet, as previously stated, it continues to darken the blacks), I dont think this will be as easy as one would think...
But then again, I could be completely wrong..?