FS7: A7RIII cin4 Sgamutcine3 match FS7 slog3 CineEI Sgamutcine3 with lutcalc convertion

[rudo_fr]

I tried to found the better way to match my A7RIII (PP cine4 S-gamutcine3) to my FS7 (pp Slog3 Cineei S-gamutcine3) with lutcal.
Idea is to made a lut convertion with lutcalc and then apply same slog3 lut on two cameras clips and have good colors matching between the two cameras.
I do that because A7RIII is 8bits and with slog3 there is banding. No ETTR expo for A7RIII just normal exposure.

First step, i apply my lut convertion made with lutcal on A7RIII clips (shooted in cine4 S-gamut-cine3) and then i apply same Slog3 lut i usually use for grading Fs7 clips.
here are the setting in lut cal:


Did you see something wrong in lutcalc convertion i did ?
Do you think it is a good idea?
Results grading are not bad at all.

here the lut convertion (Cine4 S-gamutcine3 to Slog3 S-gamutcine3):
http://rudproductions.com/A7RIII709toSlog3Cin3.zip