This is how to replace your bumper guard/grommet strips. This should be done for a number of reasons. 1) If the bumper guard has worn through and you are now hitting graphite when you scrape it on the ground. 2) If the grommets are coming apart and the string has a chance at touching the frame. 3) You wish to add lead tape in a more conspicuous manner. Enjoy!
This is a short video showing how easy it is to replace a bumper guard and how to hide some lead tape underneath it for a little added weight. This is very common practice among many of the top touring ATP pros. Roger Federer is one of them.