I ran a Blue Lace on a 12" 3DR arm, worked but far from optimal results. You can purchase a great condition FR-64S for $2500 that works excellent with Koetsu.
@lewm The skating force changes the direction using the ViV Rigid Float.
At the "lead-in groove" (the start of an LP) there is a very weak force to the inside. Most of the part of an LP there is no noticable force (even with a flat / non-grooved platter no movement). At the "lead-out groove" (the end of an LP) there is a very weak force towards the outside.
In average the skating force is negligible compared to a "normal" tonearm.
I have heard many fine systems utilizing Koetsu cartridges, but, I cannot say to what extent the particular tonearm contributed to, or detracted from, the sound I heard. A local dealer that is particularly fond of Koetsu cartridges likes the Ortofon RS-309D tonearm (12" tonearm that can accommodate a SPU-type headshell).
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