Koetsu cartridges - what arms work?

Any thoughts on a Koetsu mounted to a Well Tempered arm?? Particularly a Urushi or one of the stone bodies. Low mass arm, but highly damped...??

I’ve used various Koetsu cartridges (Coralstone Plat, Jade Plat, Onyx Plat, Onyx Sig, RSP) between a Fidelity Research FR64fx and Graham Phantom Supreme 10". Both arms pair great.

I have a rebuilt ( from Koetsu ) Rosewood.
Two tonearms.
One a Moerch DP8 ( 12 inch, blue armwand )
Two a Fidelity Research FR66s. Various headshells. The best fit was the Arche w/ silver leads.

The Koetsu sounded sublime in both arms. If I had to pick a winner, it would probably be the FR66s.

Now I'm not saying the FR66s is better than the Moerch. But with the Rosewood, it is to my ears. The Moerch, I think, bettered the FR66s with some other cartridges.

But both were superb performers with the Rosewood.

I am running a Koetsu Urushi Gold in an FR-64fx.  Works great.  I was told by a long lost friend at Sumiko that Koetsu's were originally designed by Sugano for FR tonearms.

I also have a Sumiko MDC-800 and it does not work as well with the Koetsu as with the FR.  The MDC-800, with a 3g headshell weight, works very well with my Miyajima Shilabe.    Both are low compliance cartridges - so go figure.  

As my friend Raul often points out - putting a cartridge and a tonearm together is like a marriage - it can go great, or it can cause you to tear your hair out, and the only way to find out how it's going to go is to try it.  Spec.s only tell you so much.

Koetsu stone in a Dynavektor arm.....  this arm will keep it in check.