Tuning that reg without the special inline adjuster is an absolute PITA. You'll be doing sequential light attachment and removal of the QD fitting, because as I recollect, the ID of the fitting won't accept the size hex needed to adjust the orifice.
Sequentially screw in the orifice, lightly replace the QD and pressurize, until the valve just seals. Then remove the QD one more time and add another 45° turn for spec cracking effort (1.5-2.1" WC). Very stiff.
Lever should end up just over 3mm below case rim when pressurized, but the key is measured cracking effort.
Tuning by counting turns is inadvisable. A twelfth of a turn discrepancy may be 0.2" difference in cracking effort.
There is no independent adjustment of spring tension in this overly complex regulator. The orifice controls everything: spring tension, seat seal AND lever height. That's a prescription for a bad outcome at depth if your lever height is too low due to a scratched knife edge or worn seat. One of my least favorite regs to service. Good luck.