Although a Koetsu will "work" on a Triplanar and sound good, I get the impression that Koetsu's can sound even better on higher mass tonearms. Koetsu has very low compliance; Triplanar is "medium" mass tonearm. Of course, you can always stick a penny or a wad of gum on the Triplanar headshell to increase its effective mass, instead of finding a whole 'nuther tonearm which might not otherwise be as good as a Triplanar. Seriously, some added mass on the headshell might be a good thing. I think a penny weighs 5 gm. Some prefer blue tac.
