Eldartford, I am impressed with your skill and/or luck. Great advice to Nrchy to practice first on some old or blown out drivers.
I tried BOTH the pin and paper clip "thing" last night on an old blown Yamaha woofer obtained from my nephew for free. The funny thing is NEITHER method worked for me. I discovered that the dust cap permanently retained the "memory" of the dent. Every time I popped out the dent, it would just pop back in. LOL. After repeating this a few dozen times, the dust cap started coming off cleanly at the seam. I carefully and completely removed the dust cap. I have had little luck in massaging out the dent with my fingers, let alone the pin and paper clip. Yes, I must be an unlucky klutz ;-)
Yes sir, I agree with Eldartford on the practice before proceeding to your Kharma. Perhaps you can get a lot of free practice at your local junkyard or obtain some cheap junk speakers for experimentation.
Now, I fully understand the speaker manufacturer's response to Cmp.
Best wishes to all,