the key is for the machine to see the center tires as the "largest". This will always be the case with this design. It's easy for the centers to slip. It is more difficult for the front/rear to slip as they have significant "wrap" and tension around them. You'll still be able to run higher pressure in the centers if you want and not have problems slipping even "without" tuners. But, tuners eliminate the vehicle-weight load on the center tires altogether. You'll definitely notice a "load" difference and mileage increase. I don't plan to remove mine unless the extra load on the front/rear axles and hubs proves to be detrimental. I think it's just as important to maintain proper tension in your chains to prevent the momentary "over-tension", release, and shock-loading of your drivetrain from loose chains. That seems to be what has caused the most wear and tear in my experience.