If you mean this mount, it will attach directly to the action rail. I would go with a Spuhr or something similar over the Sako mount. It’s steel and each ring is attached to the base with a screw/bolt.
Nice, that elevation will help. I’m down at sea level. Have you done a tall target test on the Mk5? I just saw a new mil contract model with almost 3% error in the turrets.