Here is first prototype SICS chassi from 2020, a lot of things are similar but refined on production model.
The most important thing from day1 was to have LOP quick adjustable to get correct eyerelief regardless of shooting position.
That is to me still the main feature of Sics even though features as arca slider, folder (to ease of cleaning) adjustable bagrider etc also is important.
What feature do you rate as most important?
And you really must using or have used Sics to understand the Lop feature as almost everybody that not shoot sics don’t value the Lop feature and almost everybody who shoot sics use the Lop feature.( Lop feature- you change lop within 2 seconds and in the run)