My primary speakers being Maggies,I have no dust caps to dent! However, in recent memory I found a dented cap on a dynaudio box that I was using for rear channels, and I did the pin thing with perfect results. In the past 50 years I have probably fixed half a dozen drivers for my own and kids speakers.
A suggestion...find an old (perhaps blown out) driver, dent the cap, and try fixing it. This would give you confidence to tackle your good speaker.
A suggestion...find an old (perhaps blown out) driver, dent the cap, and try fixing it. This would give you confidence to tackle your good speaker.