I agree that image quality is the only objective, however, along with the lack of stain came low speed and shadow drop out (at iso 50!) which leads me to think that I did something wrong. I thought that as the stain is printing density, the lack of it may have been the cause of the low speed etc. I will try another few rolls and see what happens....

regardless of the lack of stain, grain just was not visible to anything but the most detailed stare!