Originally Posted by HifiSyd
I think I used a combination of my finger and the tip of the reaming tool. If there were any stubborn areas that wouldn't fold in, I cut them off carefully with a razor blade.
I ended up using the sides of a small phillips screw driver to push the edges in as much as I could then trimmed the edges with an x-acto knife. Then I realized that the plastic retainers I bought were too big
Time to go back to the auto parts store for smaller ones.