Deoldify Vapoursynth filter

[Selur]

Got a few questions:
a.

:param BlackWhiteTune:      This parameter allows to improve contrast and luminosity of frames colored with HAVC.
                            Allowed values are:
                                    'None' (default)
                                    'Light',
                                    'Medium',
                                    'Strong'
                                    'Light+Custom',
                                    'Medium+Custom',
                                    'Strong+Custom'
                                    'Light+Restore',
                                    'Medium+Restore',
                                    'Strong+Restore'

What does the 'Custom' ,'Restore' do?
Especially for 'custom' I would expect some additional option for the user?

b.

:param BlackWhiteMode:      Method used by BlackWhiteTune to perform colors adjustments.
                             Allowed values are:
                                      0 : Apply Contrast Limited Adaptive Histogram Equalization on Luma
                                      1 : Apply simple Histogram Equalization on all RGB channels
                                      2 : Apply CLAHE on all RGB channels
                                      3 : method=0 and method=1 are merged
                                      4 : Automatic brightness and contrast optimization with ScaleAbs
                                      5 : Auto brigh and contrast optim. with saturation arithmetic (default)

Do I get it right, that BlackWhiteMode should only be set and enabled in the GUI when 'BlackWhiteTune' is set to anything but 'None' ?
Or should BlackWhiteMode only be used when 'BlackWhiteTune' uses a '..+Custom'-value?

Cu Selur