Need some advice on replacing a B&W tweeter

My LCR60 S3 tweeter is pretty mangled, afraid it DOES impact the sound. They are offering the DIAPHRAGM on ebay and other places for little cost (under $20), but not the whole speaker (ZZ12939 ??).

How does replacing the diaghragm only work? Any links? Obviously the leads need to be soldered back on. But is gluing of the diaphragm needed (like refoaming)? How to ensure voice is conentric in the gap? Does the ferrofluid (not even sure if the tweeter IS fluid cooled) need to be topped off/replaced as well?

Or better off buying a complete tweeter?

What B&W models use the same tweeter (if any)? Found this list (no idea if accurate, or only applying to the diapgragm).

• DM600 S3
• DM601 S3
• DM602 S3
• DM602.5 S3
• DM603 S3
• DM604 S3
• LCR600 S3
• LCR60 S3

Also found ZZ12947 as part number for the tweeter? 

Youtube has shown how easy it is to replace them.  I could not tell the difference on my N805 when listening. My kids pushed in one of them years.  It was a cosmetic thing for me to change it 5 years later. Good kuck