[Alfonso]

I broke my mustang cap, then the second time I did in a different maner: Left hand use a cupping glass while with other hand insert around the small gap a nylon thread (or the dental floss(good idea Tom!)), then use this tie to press into the clips and pull slightly with cupping glass. (I hope you understood me because its a little bit difficoult to explain it in my poor english)

Cheers

Alfonso