Have a Shadow 2 that I converted to SAO/adj trigger early on when it was new.
Just did a teardown and clean/spring replacement @ 6,200 rounds. Have a 13# recoil spring and 13# hammer/main spring.
Installed a reduced power trigger return spring. Reset is good, short. My only complaint is I can't feel the trigger when it resets nor can I hear it.
Is the lack of tactile/audible reset due to the RP TRS or
?