I ordered the kit recently. Still waiting on delivery but I'll chime in here when I know something.
The interesting thing to me is, this seems to increase the effective mass of the tonearm by adding friction in the horizontal plane. Which should make the tonearm more amenable to a range of carts with different compliances. and in addition the 'extra' mass is adjustable depending how much you tighten the pivot, meaning the arm's mass can be fine tuned to the cartridge. And even more, you get a more precise AND stable way to adjust the azimuth to boot. That all seems kind of brilliant.