I reread Ctein's section on masking for color negatives and I have a question for those of you that do this regularly: Do I need a special film developer to get neutral color masks? I plan on using Delta 100 film since it is easier to get and cheaper than T-Max 100, and I can get the chemicals necessary to mix the SoftShot formula that Ctein describes; but if Xtol or HC-110 will be neutral, I would rather use one of them. Thanks.