Digital BW, The Print

Hi Guy's,

Thanks to your kindly natures I'm doing OK on my quad quest.... but 
I've a quick question (sorry)

To get my images even better on my chosen papers I need to manipulate 
the 95% step on my step wedge to being slightly lighter to seperate 
it from 100%.

My question is this. Do I adjust all curves or is there a spacific 
combanation of curve that controls this area of ink output? A speedy 
answer for a frustrated and impatient apprentice would be appreciated

Cheers for now...

Damian