Newbie...I apologize if this is the incorrect place for this. I crashed my drone and now feel a slight resistance from one of the motors that none of the others have. It's not great and would certainly not prohibit the prop from turning but I am concerned it may play with the aerodynamics of flight. It is a very slight resistance where as the others feel smooth this one feels slightly "bumpy" There is no play or wiggle to it and it appears undamaged to the naked eye. I can not seem to find the motors as a replacement part even though it can clearly be removed. In searching for it I ran across items used to "balance your props" not sure what they do or how they work or if they are even designed for this problem. Any help is appreciated.