Don't know if this thread still matters to you, but I found the Kansui to be very sensitive to VTF and anti-skate on my Tri-planar. I had to drop VTF to around 2.16 before it really opened up on top, with minimal anti-skate (although more than zero--I had to get a lighter anti-skate weight from Tri Mai). I'm loading at 315 ohms. At even slightly higher tracking weight (like, .02 grams more) I found it sluggish on top. Now it sounds well-balanced, full, dynamic and detailed. It's an excellent cartridge. To me it sounds like an extremely refined SPU.
I also have an A90 on a different arm and table, and it, too, took a lot of patience to dial in. It sounds quite unlike the Kansui--leaner and less robust but more pristine and pure. They offer different but equally valid presentations, and are worth the effort to get right, IMO.