Koetsu Cartridge on Acoustical Systems Axiom!

Yes.

You can see it in my Sytem.

And is it a real excellent match or would you recommend other systems with better synergy with the Axiom?

I think that is a bad combination. The Koetsu is perhaps the lowest compliance cartridge on the market. The Axiom is a lighter arm and the head shell is not what you would call a stiff design. The Axiom would be better with a cartridge in the 13 to 20 um/mN range. The Koetsu is 5 um/mN! You could add mass to the headshell but you had better have a good record clamping system. I have listened to the Coralstone version but not in that arm. It was a Kuzma 4Point 14. Nice cartridge but not the best tracker. 

The Axiom is a lighter arm and the head shell is not what you would call a stiff design. The Axiom would be better with a cartridge in the 13 to 20 um/mN range.

 
This is not correct. The Axiom has an effective mass over 20g and will match the low compliance Koetsu range very well.

Dover, 20 gm? Actually 22 to 40 gm tunable so I stand corrected. I did not realize it was a 12 Inch arm. That is what I get for eyeballing things. The Kuzma 4 Point 14 has an effective mass of 19 gm and visually it is a much bigger arm. So I wonder if those figures for the Axiom include a cartridge? I still do not like the design of the head shell. There are problems with a very heavy arm and a low compliance cartridge. Lighter arms with higher compliance cartridges have inherently less tracking distortion as they follow record irregularities better. Less inertia.