Dude! First off, you can simply insert Ozone on the Master Buss when the mix is complete. Secondly, novice use of Ozone is FULL of pitfalls, like the 'louder is better' trap and wind up smashing the mix into a squashed wave with Ozone's limiter. Use K14 on your meters. Lastly, unless you have some really good monitors, and you have tested your listening environment with RoomEQWizard 5.0 or the like, your mastering efforts are doomed.