I had to replace a rounded nipple so I cut an X into the rim tape over the hole to replace it but neglected to patch the hole before reinstalling the tube/tire. Didn't think about the tube finding it's way into that breech under 100lbs of air pressure and popping...
Glad I saved the 6" of rim tape scraps I trimmed off when putting the tape on my wheelset. A 1" piece patched the hole on the rim tape securely.
somegeek