MM cartridges

Great Dover, thanks for all the info. The Kuzma Stogi Reference looks like it might be able to handle all the physical energy the Londons (or other low-compliance designs) throw into an arm. The arm tube is pretty massive (similar in shape to the SME V), and Frank's bearings appear to be respectable, though they are only common carbon steel of a good but not excellent grade. Have you mounted a Decca/London on a Reference?

Oops, sorry for hijacking the thread. I shan't do it again mates!

I running the Decca Jubilee on a Graham 2.2 (unipivot), and have consistent excellent results. I would consider it in my top 5 (out of 70+) cartridges. I also used it on my JVC 7045 'S' shaped arm with the same excellent results.
Of course you want a arm with good bearings! Why would anyone want a are with 'bad' bearings?

DSGriffiths,
The Graham 2.2 as you have stated is a unipivot, whereas the JVC 7045 has gimbal bearings. It is surprising that you get the same results with both arms with the Decca. I have set up about 20-25 Deccas on half a dozen different arms and heard substantive differences depending on arm and which Decca model is installed, even sample variations between Decca's.
Martin Colloms of Hifi News had variable tracking results when using different arms - Linn Ittok, Naim Aro, SME V - despite all having good bearings.
These variable results concur with my own experiences.

OK, well lots of feedback on the Deccas (which is my first preference). The Decca Garrot I used was purchased new in the mid/late 80's. It is long gone and was mounted on a Morch DP-6 (unipivot). The audio mods appears to be an arm that the designer keeps squeezing better performance out of with each newer level. The new London Deccas are said to be built much more reliable and better sounding. Plus they can now be purchased with a "pod". A interface between tone arm and cartridge that adds mass. I wonder if it also helps dampen the energy between cartridge and arm? If so, perhaps more types of arms can be used.