Hello @whart . Good to hear from you!
About the K line, I have heard several people say this as well, that the KRSP is the sweet spot. Mulveling says that the difference between KRSP and stone is not large, but that the difference between boron and diamond cantilever is the place to spend. If I have rendered his views correctly.
Anyway, love the cartridge, but with the cost of rebuilding the d/c, I’m kind of thinking about finding a second stringer. Hence the question about SoundSmith.
Are you sure that your stone bodies aren’t simply revealing what was already there? "Cause I don’t think that my KRSP is making up for anything - just the opposite - it doesn’t suffer error gladly. Every time my adjustment gets finer, so does the sound.
Latest adjustment was a panzerholz wand for the tonearm. I hope to have my take on an air bearing design up in a few months, and then maybe I’ll be in the market for a Kuzma like yours!