I threw the motor on to seat the brushes today. Being so new, the brushes need to be worn down so they fully contact the commutator or you can have problems when you try putting a lot of power through it. To do this, all I did was hook it up to a 12V battery and let it spin for a while. I'll stop it after a while and check each brush to make sure that they are fully contacting.
As you can see here, none of the brushes are close to being broken in as none of them have even touched the duller band on the right side of commutator.