Hi All: I just replaced a grommet/bumper guard set with individually-cut grommets. I did this to match swing weights of two frames. I couldn't reduce weight in the hoop, as all weighting is internal. I am matching two of my Yonex Pim Pims (different frames, same static weight, but different balance and SW- grrr- they were supposed to all be identical). They don't stay put. I tried a hot hair dryer (no heat gun) and a fine-gauge awl to widen them in hopes they would stay. After that, really all I can think to do is use some sort of liquid adhesive, but that will make removing them a pain... Also, is there an "expert method" to "going bumperless?" In other words, are there preferred tools to cut them, etc? Hopefully you all can help!