Maglev doesn't require "setup" just treat as you would a spring system. there is no need for lube in the center itself since the maglev is already so low friction. if only one side of your cube is turning well, I suggest you make sure all of your tensions are equal on all sides. Feeling lube on only one side means you need to break it in with a bunch of random turns in order to equally distribute the grease. Remember, adding more lube isn't always the solution, finding your tensions is key, as they are what makes your cube unique to your solving style.