Today I decided to cut the old string and remove the bumper guard to inspect the racquet. It looked like the racquet was strung too tight as on one side the string cut through the edge of the bumper guard and it was sticking out a bit (that drove me nuts). Now I looked at the hole and saw a small crack in there. Could it be from the string or someone was pushing the bumper guard in with a sharp tool and caused the damage? The bumper is a bit worn out and is kinda hard to put on. Also, should I get a new grommet system or can I still use the old one (I just cut off the edge of the bumper that was cut through by a string)?