About a month ago, I bough a bunch of new parts and in that order I got Shadow Conspiracy Vultus bars. So I put the bars on and I got my grips on, but my bar ends won't stay in the end of the bars. They are constantly falling out now. My question is, how can I make them wider so that they fit correctly or as close to correctly as possible? I tried putting tape on them, but the tape wears out and doesn't stick. Please help.