I want to report that I finally used RGB light for scanning first time as a test
and hooo boy
it's so much better
white-light completely rapes negative colors, negative lab pro tries do do some unfucking but it doesn't matter since a shit of color information is already lost
with RGB backlight you don't need fucking negative lab pro, you just inverse the curves, set white and black points and adjust maybe color temp and the scan looks great you CAN'T do that with a uniform white light
I used this:
https://github.com/jackw01/scanlightpicrel quick shitty comparison - left NLP white light, right negative inverted by hand, scanned on RGB light
I will post better scans tomorrow