lawrence
Veteran
Has Betterscanning ever made such a diffuser pane for any of the Coolpix scanners?
Not as far as I know. I do have their glass inserts for the V750 for when a film isn't held flat enough by the film holder.
your suggestion to add exposure and to develop for a shorter time (pulling) - do you suggest this to obtain lower film contrast?
Yes but I expect you already know that decreasing development also reduces film speed so it's necessary to increase exposure to compensate.
In summary, I agree with the suggestions that you do some tests using, say, TMY in Xtol 1+1 for Kodak's recommended time as a starting point.