the basic problem i think is that guides all talk about pressures, when what really matters is the amount of air in each chamber.
unless you have a perfectly frictionless system (in zero gravity too!) pressures don’t tell you much. you have to do it by feel really..

let all air out of negative, then positive. turn damper full to fast. check fork compresses nearly all the way in (if not, probably too much oil).
pump positive to about 7bar/90psi.
flip bike upside down and pump in just enough negative to stop the fork topping out (may take a few attempts because the -ve capacity is tiny and any escaping air when removing pump messes things up). for that’s about 5-6 bar probably.

ok.. this is less +ve and way less negative air than recommended but none of the “10psi less than +ve” stuff was working.

finally, lower the floodgate so it’s just enough to stop bounce when out of saddle. and raise the damping again (not much).

adjust by making very small changes to +ve air.

works for me, and probably any other very light riders. or i just have a weird fork.