Fidelity Research FR-64x

Normally i prefer to use manufacturer recommendations first, then i need some time get used to the sound, then i can make changes (maybe). But i can't hear any single problem with Stevenson for FR-7f, at the moment FR64fx + RF-7f is a great combination. What i realized is thast my new First Watt F2J power amp and First Watt B1 passive preamp makes huge different compared to my tube gear i used before. The resolution is so high, First Watt gear must be neutral, tube gear was colored (i believe). Even my belowed WLM Phonata mm/mc phono stage sounds completely different with new First Watt amps. It was much darker with tube gear, but with high resolution First Watt gear it's just great. 

@mulveling Well I guess you have no excuse not to try the LH-8000.  I admit I was surprised too about my preference. It’s one of those things that was subtle but I kept going back to the Ortofon headshell and ultimately that’s where the RSP sounded best and where it ended up staying.  
I was able to use the Yamamoto HS6 despite the mounting holes because I can adjust overhang with my table’s sliding magnetic armboard.  

I find it extremely difficult, with Koetsu, to see the cantilever well enough to adjust lateral angle at the null points.  I rely on the cartridge body sides assuming they are parallel to the cantilever. I know this is a compromise. Let us know if the SmarTractor allows you to visualize the cantilever on your Koetsu if you end up grabbing one.

-Karl

@chakster B1 is a buffer, not passive, right? Passive preamps sound horrible.

@invictus005 First Watt B1 is a passive buffer preamp to solve impedance issues, but it has no active gain. It has no sound signature, just the link between your source and power amp.