I use the safety accutrigger spring where the trigger spring is. Then I use half of an ink pen spring for the accutrigger spring.
I usually cut one or two coils off of the accutrigger spring to lighten the pull weight more.
Go slowly and keep checking that the accutrigger will still set with a hard bolt close. And be sure to bend the hook back on the spring to fit the hole in the bottem of the tang.
Some I can get to 8 or 9 oz reliably, some i can only get to 12 or 14 oz reliably. It seems to be up to the geometry/personality of the individual trigger as to how low you can get it, reliably.