Decca London Cartridge?


I recently discovered a Decca London Cartridge in my collection of audio detritus. It was made on Feb. 2, 1973. Does anyone have any experience with this cartridge? Is it worth having it retipped, or re-built? And, if so, where would one send it for revision?
lapaix
This cartridge arouses deep and violent opinions. I've had friends bring their "lousy mistracking Decca London" round to my rig and plug it straight in and be astounded. Then there was absolutely no mistracking at all. (Both arm and pre amp can screw things up big time). Former must be suitable. A damped unipivot great. Many highly regarded knife edge or ball bearing "classics" are rubbish with this cartridge. (highly regarded for other softer cartridges without the energy output). Also headroom in preamp can cause overload. be brave but remeber it may now require rebuild. Find a friend with a damped unipivot and good preamp.
I fondly remember my many London Decca and even spending hours in a Chicago dealers backroom picking out which I wanted. Never have I had such transparent sound. I do not even know how I ended up with none, but I did.

This may result in my trying one again, but my Schroeder arm may not be appropriate.
Forgot to mention that with the london set up properly, old classic retro turntables will sound even better (!!!) such as garrard 301 or 401 - or of course new version 501 now being made in UK. One could find some music detail gets lost with belt drives. I have Linn lp12 using london arm as well as 301 with london arm - latter is better. Surprises continue in vinylfi land. (I listen with latest QUAD ESL 989 which is also super revealing - sorry folks!)
I have a Garrard 501 coming with the Schroeder arm. I might once again have to try the London. I well remember its magic. I guess I sold them because of tracking problems.